| Day | Date | Holiday Name | Type |
|---|---|---|---|
| Sunday | 01 January | New Year's Day | State Holiday |
| Sunday | 01 January | New Year's Day | Federal Holiday |
| Sunday | 01 January | New Year's Day | State Holiday |
| Monday | 02 January | New Year's Day (substitute) | State Holiday |
| Monday | 02 January | New Year's Day (substitute) | Federal Holiday |
| Tuesday | 03 January | Asarah B'Tevet | Jewish holiday |
| Wednesday | 04 January | World Braille Day | United Nations observance |
| Friday | 06 January | Epiphany | Christian |
| Saturday | 07 January | Orthodox Christmas Day | Orthodox |
| Saturday | 07 January | International Programmers' Day | Worldwide observance |
| Saturday | 07 January | Estelle Reel Day | State Observance |
| Sunday | 08 January | Battle of New Orleans | State Legal Holiday |
| Friday | 13 January | Friday the 13th | Worldwide observance |
| Friday | 13 January | Stephen Foster Memorial Day | Observance |
| Saturday | 14 January | Orthodox New Year | Orthodox |
| Sunday | 15 January | World Religion Day | Worldwide observance |
| Monday | 16 January | Martin Luther King Jr. Day | Federal Holiday |
| Monday | 16 January | Martin Luther King Jr. Day | State Holiday |
| Monday | 16 January | Robert E. Lee's Birthday | State Holiday |
| Monday | 16 January | Idaho Human Rights Day | State Holiday |
| Monday | 16 January | Civil Rights Day | State Holiday |
| Thursday | 19 January | Robert E. Lee's Birthday | State Legal Holiday |
| Thursday | 19 January | State Holiday | State Observance |
| Thursday | 19 January | Confederate Heroes' Day | State Holiday |
| Sunday | 22 January | Lunar New Year | Observance |
| Tuesday | 24 January | International Day of Education | United Nations observance |
| Thursday | 26 January | International Customs Day | Worldwide observance |
| Friday | 27 January | International Day of Commemoration in Memory of the Victims of the Holocaust | United Nations observance |
| Sunday | 29 January | World Leprosy Day | Worldwide observance |
| Sunday | 29 January | Kansas Day | State Observance |
| Wednesday | 01 February | National Freedom Day | Observance |
| Wednesday | 01 February | National Girls and Women in Sports Day | Observance |
| Wednesday | 01 February | First Day of Black History Month | Annual Monthly Observance |
| Thursday | 02 February | World Wetlands Day | Worldwide observance |
| Thursday | 02 February | Groundhog Day | Observance |
| Friday | 03 February | National Wear Red Day | Observance |
| Saturday | 04 February | International Day of Human Fraternity | United Nations observance |
| Saturday | 04 February | World Cancer Day | Worldwide observance |
| Saturday | 04 February | Rosa Parks Day | Local observance |
| Saturday | 04 February | Rosa Parks Day | State Observance |
| Monday | 06 February | Tu Bishvat/Tu B'Shevat | Jewish holiday |
| Monday | 06 February | International Day of Zero Tolerance for Female Genital Mutilation | United Nations observance |
| Monday | 06 February | Ronald Reagan Day | State Observance |
| Friday | 10 February | World Pulses Day | United Nations observance |
| Saturday | 11 February | International Day of Women and Girls in Science | United Nations observance |
| Saturday | 11 February | World Day of the Sick | Worldwide observance |
| Sunday | 12 February | Lincoln's Birthday | State Holiday |
| Sunday | 12 February | Lincoln's Birthday | State Legal Holiday |
| Sunday | 12 February | Georgia Day | State Observance |
| Sunday | 12 February | Super Bowl | Sporting event |
| Monday | 13 February | World Radio Day | United Nations observance |
| Monday | 13 February | Lincoln's Birthday observed | State Holiday |
| Tuesday | 14 February | Valentine's Day | Observance |
| Tuesday | 14 February | Statehood Day | Local observance |
| Wednesday | 15 February | Susan B. Anthony's Birthday | State Observance |
| Thursday | 16 February | Elizabeth Peratrovich Day | State Observance |
| Saturday | 18 February | Maha Shivaratri | Hindu Holiday |
| Saturday | 18 February | Isra and Mi'raj | Muslim |
| Monday | 20 February | World Day of Social Justice | United Nations observance |
| Monday | 20 February | Presidents' Day | Federal Holiday |
| Monday | 20 February | Presidents' Day | State Holiday |
| Monday | 20 February | Presidents' Day | State Legal Holiday |
| Monday | 20 February | Daisy Gatson Bates Day | State Holiday |
| Tuesday | 21 February | International Mother Language Day | United Nations observance |
| Tuesday | 21 February | Shrove Tuesday/Mardi Gras | State Holiday |
| Tuesday | 21 February | Shrove Tuesday/Mardi Gras | Observance, Christian |
| Wednesday | 22 February | Ash Wednesday | Christian |
| Saturday | 25 February | African-American Scientist and Inventor Day | State Observance |
| Saturday | 25 February | George Rogers Clark Day | State Observance |
| Tuesday | 28 February | Linus Pauling Day | Local observance |
| Wednesday | 01 March | Zero Discrimination Day | United Nations observance |
| Wednesday | 01 March | Self-Injury Awareness Day | Worldwide observance |
| Wednesday | 01 March | St. David's Day | Observance, Christian |
| Wednesday | 01 March | First Day of Women's History Month | Annual Monthly Observance |
| Wednesday | 01 March | First Day of Irish American Heritage Month | Annual Monthly Observance |
| Thursday | 02 March | Texas Independence Day | State Holiday |
| Thursday | 02 March | Read Across America Day | Observance |
| Friday | 03 March | World Wildlife Day | United Nations observance |
| Friday | 03 March | Employee Appreciation Day | Observance |
| Saturday | 04 March | Casimir Pulaski Day | State Observance |
| Monday | 06 March | Casimir Pulaski Day | State Observance |
| Tuesday | 07 March | Holi | Hindu Holiday |
| Tuesday | 07 March | Purim | Jewish holiday |
| Tuesday | 07 March | Town Meeting Day | State Holiday |
| Wednesday | 08 March | International Women's Day | United Nations observance |
| Thursday | 09 March | World Kidney Day | Worldwide observance |
| Friday | 10 March | International Day of Women Judges | United Nations observance |
| Sunday | 12 March | Daylight Saving Time starts | Clock change/Daylight Saving Time |
| Friday | 17 March | St. Patrick's Day | Observance, Christian |
| Friday | 17 March | Evacuation Day | State Holiday |
| Monday | 20 March | French Language Day | United Nations observance |
| Monday | 20 March | International Day of Happiness | United Nations observance |
| Monday | 20 March | March Equinox | Season |
| Tuesday | 21 March | International Day for the Elimination of Racial Discrimination | United Nations observance |
| Tuesday | 21 March | World Poetry Day | United Nations observance |
| Tuesday | 21 March | International Day of Nowruz | United Nations observance |
| Tuesday | 21 March | World Down Syndrome Day | United Nations observance |
| Tuesday | 21 March | International Day of Forests | United Nations observance |
| Wednesday | 22 March | World Water Day | United Nations observance |
| Thursday | 23 March | Ramadan Starts | Muslim |
| Thursday | 23 March | World Meteorological Day | United Nations observance |
| Friday | 24 March | World Tuberculosis Day | United Nations observance |
| Friday | 24 March | International Day for the Right to the Truth concerning Gross Human Rights Violations and for the Dignity of Victims | United Nations observance |
| Saturday | 25 March | International Day of Remembrance of Slavery Victims and the Transatlantic Slave Trade | United Nations observance |
| Saturday | 25 March | International Day of Solidarity with Detained and Missing Staff Members | United Nations observance |
| Saturday | 25 March | Earth Hour | Worldwide observance |
| Saturday | 25 March | Maryland Day | Local observance |
| Sunday | 26 March | Prince Jonah Kuhio Kalanianaole Day | State Holiday |
| Monday | 27 March | Prince Jonah Kuhio Kalanianaole Day observed | State Holiday |
| Monday | 27 March | Seward's Day | State Holiday |
| Wednesday | 29 March | National Vietnam War Veterans Day | Observance |
| Thursday | 30 March | Wyoming Veterans Welcome Home Day | State Observance |
| Thursday | 30 March | Doctors' Day | Observance |
| Thursday | 30 March | Vietnam Veterans Day | State Observance |
| Friday | 31 March | César Chávez Day | State Holiday |
| Saturday | 01 April | April Fool's Day | Worldwide observance |
| Sunday | 02 April | Palm Sunday | Christian |
| Sunday | 02 April | World Autism Awareness Day | United Nations observance |
| Sunday | 02 April | Pascua Florida Day | Local observance |
| Monday | 03 April | Pascua Florida Day observed | Local observance |
| Tuesday | 04 April | United Nations' Mine Awareness Day | United Nations observance |
| Wednesday | 05 April | Passover Eve | Jewish holiday |
| Wednesday | 05 April | International Day of Conscience | United Nations observance |
| Thursday | 06 April | Maundy Thursday | Christian |
| Thursday | 06 April | Passover (first day) | Jewish holiday |
| Thursday | 06 April | International Day of Sport for Development and Peace | United Nations observance |
| Thursday | 06 April | National Tartan Day | Observance |
| Friday | 07 April | United Nations' World Health Day | United Nations observance |
| Friday | 07 April | Day of Remembrance of the Victims of the Rwanda Genocide | United Nations observance |
| Friday | 07 April | Good Friday | State Holiday |
| Friday | 07 April | State Holiday | State Holiday |
| Saturday | 08 April | Holy Saturday | Christian |
| Sunday | 09 April | Easter Sunday | Observance, Christian |
| Monday | 10 April | Easter Monday | Observance, Christian |
| Wednesday | 12 April | International Day of Human Space Flight | United Nations observance |
| Thursday | 13 April | Last Day of Passover | Jewish holiday |
| Thursday | 13 April | Thomas Jefferson's Birthday | Observance |
| Friday | 14 April | Orthodox Good Friday | Orthodox |
| Friday | 14 April | World Chagas Disease Day | United Nations observance |
| Saturday | 15 April | Orthodox Holy Saturday | Orthodox |
| Saturday | 15 April | Father Damien Day | Local observance |
| Sunday | 16 April | Orthodox Easter | Orthodox |
| Sunday | 16 April | Emancipation Day | State Holiday |
| Monday | 17 April | Lailat al-Qadr | Muslim |
| Monday | 17 April | Orthodox Easter Monday | Orthodox |
| Monday | 17 April | Emancipation Day observed | State Holiday |
| Monday | 17 April | Patriots' Day | State Holiday |
| Monday | 17 April | Boston Marathon | Sporting event |
| Tuesday | 18 April | Yom HaShoah | Jewish commemoration |
| Tuesday | 18 April | International Day for Monuments and Sites | Worldwide observance |
| Tuesday | 18 April | Tax Day | Observance |
| Thursday | 20 April | Chinese Language Day | United Nations observance |
| Friday | 21 April | World Creativity and Innovation Day | United Nations observance |
| Friday | 21 April | San Jacinto Day | State Holiday |
| Friday | 21 April | Arbor Day | State Observance |
| Saturday | 22 April | Eid al-Fitr (Tentative Date) | Muslim |
| Saturday | 22 April | Earth Day | United Nations observance |
| Saturday | 22 April | Oklahoma Day | Local observance |
| Sunday | 23 April | World Book and Copyright Day | United Nations observance |
| Sunday | 23 April | English Language Day | United Nations observance |
| Monday | 24 April | International Day of Multilateralism and Diplomacy for Peace | United Nations observance |
| Monday | 24 April | Arbor Day | State Observance |
| Monday | 24 April | Confederate Memorial Day | State Holiday |
| Monday | 24 April | Confederate Memorial Day | State Holiday |
| Tuesday | 25 April | International Delegate's Day | United Nations observance |
| Tuesday | 25 April | World Malaria Day | United Nations observance |
| Tuesday | 25 April | National Library Workers' Day | Observance |
| Wednesday | 26 April | Yom Ha'atzmaut | Jewish holiday |
| Wednesday | 26 April | World Intellectual Property Day | United Nations observance |
| Wednesday | 26 April | International Chernobyl Disaster Remembrance Day | United Nations observance |
| Wednesday | 26 April | Confederate Heroes' Day | Local observance |
| Wednesday | 26 April | State Holiday | State Observance |
| Wednesday | 26 April | Administrative Professionals Day | Observance |
| Thursday | 27 April | International Girls in ICT Day | United Nations observance |
| Thursday | 27 April | Take our Daughters and Sons to Work Day | Observance |
| Friday | 28 April | World Day for Safety and Health at Work | United Nations observance |
| Friday | 28 April | Arbor Day | State Holiday |
| Friday | 28 April | Arbor Day | State Observance |
| Sunday | 30 April | International Jazz Day | United Nations observance |
| Monday | 01 May | Law Day | Observance |
| Monday | 01 May | Loyalty Day | Observance |
| Monday | 01 May | Lei Day | Local observance |
| Monday | 01 May | First Day of Military Appreciation Month | Annual Monthly Observance |
| Monday | 01 May | First Day of Asian Pacific American Heritage Month | Annual Monthly Observance |
| Monday | 01 May | First Day of Jewish American Heritage Month | Annual Monthly Observance |
| Tuesday | 02 May | World Tuna Day | United Nations observance |
| Tuesday | 02 May | National Teacher Appreciation Day | Observance |
| Wednesday | 03 May | World Press Freedom Day | United Nations observance |
| Thursday | 04 May | Kent State Shootings Remembrance | Local observance |
| Thursday | 04 May | National Day of Prayer | Observance |
| Thursday | 04 May | Rhode Island Independence Day | Local observance |
| Thursday | 04 May | West Virginia Day of Prayer | State Observance |
| Friday | 05 May | Day of Vesak | United Nations observance |
| Friday | 05 May | World Portuguese Language Day | United Nations observance |
| Friday | 05 May | Cinco de Mayo | Observance |
| Friday | 05 May | Kentucky Oaks | Sporting event |
| Saturday | 06 May | Kentucky Derby | Sporting event |
| Saturday | 06 May | National Nurses Day | Observance |
| Saturday | 06 May | National Explosive Ordnance Disposal (EOD) Day | Observance |
| Sunday | 07 May | International Family Equality Day | Worldwide observance |
| Monday | 08 May | Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War | United Nations observance |
| Monday | 08 May | World Ovarian Cancer Day | Worldwide observance |
| Monday | 08 May | World Red Cross and Red Crescent Day | Worldwide observance |
| Monday | 08 May | Truman Day | State Holiday |
| Monday | 08 May | Victory in Europe Day | Observance |
| Tuesday | 09 May | Lag BaOmer | Jewish holiday |
| Wednesday | 10 May | International Day of Argania | United Nations observance |
| Wednesday | 10 May | Confederate Memorial Day | State Holiday |
| Wednesday | 10 May | Confederate Memorial Day | Local observance |
| Friday | 12 May | International Nurses Day | Worldwide observance |
| Friday | 12 May | Native American Day | State Observance |
| Friday | 12 May | Military Spouse Appreciation Day | Observance |
| Friday | 12 May | Military Spouse Appreciation Day | State Observance |
| Saturday | 13 May | World Migratory Bird Day | United Nations observance |
| Sunday | 14 May | Mother's Day | Observance |
| Sunday | 14 May | Mother's Day | State Holiday |
| Monday | 15 May | International Day of Families | United Nations observance |
| Monday | 15 May | Peace Officers Memorial Day | Observance |
| Tuesday | 16 May | International Day of Living Together in Peace | United Nations observance |
| Tuesday | 16 May | International Day of Light | United Nations observance |
| Wednesday | 17 May | World Telecommunication and Information Society Day | United Nations observance |
| Thursday | 18 May | Ascension Day | Christian |
| Friday | 19 May | National Defense Transportation Day | Observance |
| Saturday | 20 May | World Bee Day | United Nations observance |
| Saturday | 20 May | World Autoimmune / Autoinflammatory Arthritis Day | Worldwide observance |
| Saturday | 20 May | Public Lands Day | State Observance |
| Saturday | 20 May | Armed Forces Day | Observance |
| Saturday | 20 May | Preakness Stakes | Sporting event |
| Sunday | 21 May | World Day for Cultural Diversity for Dialogue and Development | United Nations observance |
| Sunday | 21 May | International Tea Day | United Nations observance |
| Monday | 22 May | International Day for Biological Diversity | United Nations observance |
| Monday | 22 May | National Maritime Day | Observance |
| Monday | 22 May | Harvey Milk Day | Local observance |
| Tuesday | 23 May | International Day to End Obstetric Fistula | United Nations observance |
| Wednesday | 24 May | Emergency Medical Services for Children Day | Observance |
| Thursday | 25 May | African Liberation Day | Worldwide observance |
| Thursday | 25 May | National Missing Children's Day | Observance |
| Friday | 26 May | Shavuot | Jewish holiday |
| Sunday | 28 May | Pentecost | Christian |
| Monday | 29 May | Whit Monday | Christian |
| Monday | 29 May | International Day of United Nations Peacekeepers | United Nations observance |
| Monday | 29 May | Memorial Day | Federal Holiday |
| Monday | 29 May | Decoration Day | State Holiday |
| Monday | 29 May | Jefferson Davis' Birthday | Local observance |
| Wednesday | 31 May | World No Tobacco Day | United Nations observance |
| Thursday | 01 June | Global Day of Parents | United Nations observance |
| Thursday | 01 June | First Day of Pride Month | Annual Monthly Observance |
| Thursday | 01 June | First Day of Caribbean-American Heritage Month | Annual Monthly Observance |
| Thursday | 01 June | Statehood Day | Local observance |
| Saturday | 03 June | World Bicycle Day | United Nations observance |
| Saturday | 03 June | Jefferson Davis' Birthday | Local observance |
| Sunday | 04 June | Trinity Sunday | Christian |
| Sunday | 04 June | International Day of Innocent Children Victims of Aggression | United Nations observance |
| Sunday | 04 June | Native American Day | State Holiday |
| Monday | 05 June | World Environment Day | United Nations observance |
| Monday | 05 June | International Day for the Fight against Illegal, Unreported and Unregulated Fishing | United Nations observance |
| Monday | 05 June | Jefferson Davis' Birthday | State Holiday |
| Tuesday | 06 June | Day of the Russian Language | United Nations observance |
| Tuesday | 06 June | D-Day | Observance |
| Wednesday | 07 June | World Food Safety Day | United Nations observance |
| Thursday | 08 June | Corpus Christi | Christian |
| Thursday | 08 June | World Oceans Day | United Nations observance |
| Saturday | 10 June | Belmont Stakes | Sporting event |
| Sunday | 11 June | Kamehameha Day | State Holiday |
| Monday | 12 June | World Day Against Child Labour | United Nations observance |
| Monday | 12 June | Kamehameha Day observed | State Holiday |
| Monday | 12 June | Loving Day | Observance |
| Tuesday | 13 June | International Albinism Awareness Day | United Nations observance |
| Wednesday | 14 June | World Blood Donor Day | United Nations observance |
| Wednesday | 14 June | Army Birthday | Observance |
| Wednesday | 14 June | Flag Day | Observance |
| Thursday | 15 June | World Elder Abuse Awareness Day | United Nations observance |
| Friday | 16 June | International Day of Family Remittances | United Nations observance |
| Friday | 16 June | Juneteenth | State Holiday |
| Friday | 16 June | Juneteenth Day | State Holiday |
| Saturday | 17 June | World Day to Combat Desertification and Drought | United Nations observance |
| Saturday | 17 June | Bunker Hill Day | Local holiday |
| Saturday | 17 June | Juneteenth Day | State Observance |
| Sunday | 18 June | Sustainable Gastronomy Day | United Nations observance |
| Sunday | 18 June | Father's Day | State Holiday |
| Sunday | 18 June | Father's Day | Observance |
| Monday | 19 June | International Day for the Elimination of Sexual Violence in Conflict | United Nations observance |
| Monday | 19 June | Juneteenth | Federal Holiday |
| Monday | 19 June | Juneteenth National Freedom Day | State Observance |
| Monday | 19 June | Juneteenth National Freedom Day | State Holiday |
| Monday | 19 June | Juneteenth Independence Day | Observance |
| Monday | 19 June | Emancipation Day | State Holiday |
| Tuesday | 20 June | World Refugee Day | United Nations observance |
| Tuesday | 20 June | West Virginia Day | State Holiday |
| Tuesday | 20 June | American Eagle Day | Observance |
| Wednesday | 21 June | International Day of Yoga | United Nations observance |
| Wednesday | 21 June | International Day of the Celebration of the Solstice | United Nations observance |
| Wednesday | 21 June | June Solstice | Season |
| Friday | 23 June | Public Service Day | United Nations observance |
| Friday | 23 June | International Widows' Day | United Nations observance |
| Sunday | 25 June | Day of the Seafarer | United Nations observance |
| Monday | 26 June | International Day Against Drug Abuse and Illicit Trafficking | United Nations observance |
| Monday | 26 June | International Day in Support of Victims of Torture | United Nations observance |
| Tuesday | 27 June | Micro-, Small and Medium-sized Enterprises Day | United Nations observance |
| Wednesday | 28 June | Carolina Day | State Observance |
| Thursday | 29 June | Eid al-Adha (Tentative Date) | Muslim |
| Thursday | 29 June | International Day of the Tropics | United Nations observance |
| Friday | 30 June | International Asteroid Day | United Nations observance |
| Friday | 30 June | International Day of Parliamentarism | United Nations observance |
| Saturday | 01 July | International Day of Cooperatives | United Nations observance |
| Tuesday | 04 July | Independence Day | State Holiday |
| Tuesday | 04 July | Independence Day | Federal Holiday |
| Tuesday | 11 July | World Population Day | United Nations observance |
| Thursday | 13 July | Nathan Bedford Forrest Day | Local observance |
| Friday | 14 July | Bastille Day | Observance |
| Saturday | 15 July | World Youth Skills Day | United Nations observance |
| Sunday | 16 July | Rural Transit Day | Observance |
| Tuesday | 18 July | Nelson Mandela Day | United Nations observance |
| Wednesday | 19 July | Muharram (Tentative Date) | Muslim |
| Thursday | 20 July | World Chess Day | United Nations observance |
| Sunday | 23 July | Parents' Day | Observance |
| Monday | 24 July | Pioneer Day | State Holiday |
| Tuesday | 25 July | World Drowning Prevention Day | United Nations observance |
| Thursday | 27 July | Tisha B'Av | Jewish holiday |
| Thursday | 27 July | Korean War Veteran Recognition Day | State Observance |
| Thursday | 27 July | National Korean War Veterans Armistice Day | Observance |
| Friday | 28 July | Ashura (Tentative Date) | Muslim |
| Friday | 28 July | World Hepatitis Day | United Nations observance |
| Sunday | 30 July | International Day of Friendship | United Nations observance |
| Sunday | 30 July | World Day Against Trafficking in Persons | United Nations observance |
| Tuesday | 01 August | Colorado Day | State Observance |
| Friday | 04 August | Coast Guard Birthday | Observance |
| Friday | 04 August | Barack Obama Day | Observance |
| Sunday | 06 August | American Family Day | State Holiday |
| Monday | 07 August | Purple Heart Day | State Observance |
| Monday | 07 August | Purple Heart Day | Observance |
| Wednesday | 09 August | International Day of the World's Indigenous People | United Nations observance |
| Saturday | 12 August | International Youth Day | United Nations observance |
| Monday | 14 August | Victory Day | State Holiday |
| Tuesday | 15 August | Assumption of Mary | Christian |
| Wednesday | 16 August | Bennington Battle Day | State Holiday |
| Friday | 18 August | Hawaii Statehood Day | State Holiday |
| Saturday | 19 August | World Humanitarian Day | United Nations observance |
| Saturday | 19 August | National Aviation Day | Observance |
| Sunday | 20 August | National Navajo Code Talkers Day | State Holiday |
| Sunday | 20 August | National Senior Citizens Day | Observance |
| Monday | 21 August | International Day of Remembrance of and Tribute to the Victims of Terrorism | United Nations observance |
| Tuesday | 22 August | International Day Commemorating the Victims of Acts of Violence Based on Religion or Belief | United Nations observance |
| Wednesday | 23 August | International Day for the Remembrance of the Slave Trade and its Abolition | United Nations observance |
| Saturday | 26 August | Susan B. Anthony Day | State Observance |
| Saturday | 26 August | Women's Equality Day | Observance |
| Sunday | 27 August | Lyndon Baines Johnson Day | State Holiday |
| Tuesday | 29 August | International Day against Nuclear Tests | United Nations observance |
| Wednesday | 30 August | Raksha Bandhan | Hindu Holiday |
| Wednesday | 30 August | International Day of the Victims of Enforced Disappearances | United Nations observance |
| Thursday | 31 August | International Day for People of African Descent | United Nations observance |
| Thursday | 31 August | International Overdose Awareness Day | Worldwide observance |
| Monday | 04 September | World Sexual Health Day | Worldwide observance |
| Monday | 04 September | Labor Day | State Holiday |
| Monday | 04 September | Labor Day | Federal Holiday |
| Tuesday | 05 September | International Day of Charity | United Nations observance |
| Thursday | 07 September | International Day of Clean Air for Blue Skies | United Nations observance |
| Thursday | 07 September | Still's Disease Awareness Day | Worldwide observance |
| Friday | 08 September | International Literacy Day | United Nations observance |
| Saturday | 09 September | International Day to Protect Education from Attack | United Nations observance |
| Saturday | 09 September | Carl Garner Federal Lands Cleanup Day | Observance |
| Saturday | 09 September | Native American Day | State Observance |
| Saturday | 09 September | California Admission Day | State Holiday |
| Sunday | 10 September | World Suicide Prevention Day | Worldwide observance |
| Sunday | 10 September | National Grandparents Day | Observance |
| Monday | 11 September | First Responders Day | State Observance |
| Monday | 11 September | Patriot Day | State Observance |
| Monday | 11 September | Patriot Day | Observance |
| Tuesday | 12 September | International Day for South-South Cooperation | United Nations observance |
| Wednesday | 13 September | International Programmers' Day | Worldwide observance |
| Friday | 15 September | International Day of Democracy | United Nations observance |
| Friday | 15 September | First Day of National Hispanic Heritage Month | Annual Monthly Observance |
| Friday | 15 September | National POW/MIA Recognition Day | Observance |
| Saturday | 16 September | Rosh Hashana | Jewish holiday |
| Saturday | 16 September | International Day for the Preservation of the Ozone Layer | United Nations observance |
| Saturday | 16 September | Rosh Hashana | State Holiday |
| Sunday | 17 September | World Patient Safety Day | United Nations observance |
| Sunday | 17 September | Constitution Day and Citizenship Day | Observance |
| Sunday | 17 September | Constitution Commemoration Day | State Holiday |
| Monday | 18 September | Ganesh Chaturthi | Hindu Holiday |
| Monday | 18 September | International Equal Pay Day | United Nations observance |
| Monday | 18 September | Air Force Birthday | Observance |
| Monday | 18 September | Constitution Day and Citizenship Day observed | Observance |
| Thursday | 21 September | International Day of Peace | United Nations observance |
| Friday | 22 September | Emancipation Day | Local observance |
| Friday | 22 September | Native American Day | State Observance |
| Friday | 22 September | Michigan Indian Day | State Observance |
| Saturday | 23 September | International Day of Sign Languages | United Nations observance |
| Saturday | 23 September | International Celebrate Bisexuality Day | Worldwide observance |
| Saturday | 23 September | Public Lands Day | State Observance |
| Saturday | 23 September | National Public Lands Day | Observance |
| Saturday | 23 September | September Equinox | Season |
| Sunday | 24 September | Gold Star Mother's Day | Observance |
| Monday | 25 September | Yom Kippur | Jewish holiday |
| Monday | 25 September | American Indian Day | State Observance |
| Monday | 25 September | Yom Kippur | State Holiday |
| Tuesday | 26 September | International Day for the Total Elimination of Nuclear Weapons | United Nations observance |
| Wednesday | 27 September | The Prophet's Birthday | Muslim |
| Wednesday | 27 September | World Tourism Day | United Nations observance |
| Thursday | 28 September | World Maritime Day | United Nations observance |
| Thursday | 28 September | International Day for Universal Access to Information | United Nations observance |
| Thursday | 28 September | World Rabies Day | Worldwide observance |
| Friday | 29 September | International Day of Awareness of Food Loss and Waste | United Nations observance |
| Friday | 29 September | World Heart Day | Worldwide observance |
| Friday | 29 September | American Indian Heritage Day | State Observance |
| Saturday | 30 September | First Day of Sukkot | Jewish holiday |
| Saturday | 30 September | International Translation Day | United Nations observance |
| Sunday | 01 October | International Day of Older Persons | United Nations observance |
| Sunday | 01 October | World Vegetarian Day | Worldwide observance |
| Monday | 02 October | World Habitat Day | United Nations observance |
| Monday | 02 October | International Day of Non-Violence | United Nations observance |
| Monday | 02 October | Frances Xavier Cabrini Day | State Holiday |
| Monday | 02 October | Child Health Day | Observance |
| Wednesday | 04 October | Feast of St Francis of Assisi | Christian |
| Thursday | 05 October | World Teachers' Day | United Nations observance |
| Friday | 06 October | Last Day of Sukkot | Jewish holiday |
| Friday | 06 October | World Cerebral Palsy Day | Worldwide observance |
| Friday | 06 October | German American Day | Observance |
| Saturday | 07 October | Shmini Atzeret | Jewish holiday |
| Sunday | 08 October | Simchat Torah | Jewish holiday |
| Sunday | 08 October | Chicago Marathon (Tentative Date) | Sporting event |
| Monday | 09 October | World Post Day | United Nations observance |
| Monday | 09 October | Leif Erikson Day | Observance |
| Monday | 09 October | Leif Erikson Day | Local observance |
| Monday | 09 October | Columbus Day | State Holiday |
| Monday | 09 October | Columbus Day | State Legal Holiday |
| Monday | 09 October | Columbus Day | Federal Holiday |
| Monday | 09 October | Fraternal Day | State Holiday |
| Monday | 09 October | Yorktown Victory Day | State Holiday |
| Monday | 09 October | Discoverers’ Day | State Observance |
| Monday | 09 October | Native American Day | State Observance |
| Monday | 09 October | Native American Day | State Holiday |
| Monday | 09 October | Indigenous People's Day | State Holiday |
| Monday | 09 October | Indigenous People's Day (Tentative Date) | State Observance |
| Monday | 09 October | Indigenous People's Day | State Observance |
| Monday | 09 October | American Indian Heritage Day | State Holiday |
| Tuesday | 10 October | World Mental Health Day | United Nations observance |
| Wednesday | 11 October | International Day for Natural Disaster Reduction | United Nations observance |
| Wednesday | 11 October | International Day of the Girl Child | United Nations observance |
| Wednesday | 11 October | Casimir Pulaski Day | State Observance |
| Thursday | 12 October | World Spanish Language Day | United Nations observance |
| Thursday | 12 October | World Sight Day | Worldwide observance |
| Friday | 13 October | Friday the 13th | Worldwide observance |
| Friday | 13 October | Navy Birthday | Observance |
| Saturday | 14 October | Robert E. Lee's Birthday | State Observance |
| Sunday | 15 October | Navratri | Hindu Holiday |
| Sunday | 15 October | International Day of Rural Women | United Nations observance |
| Sunday | 15 October | White Cane Safety Day | Observance |
| Monday | 16 October | World Food Day | United Nations observance |
| Monday | 16 October | Boss's Day | Observance |
| Tuesday | 17 October | International Day for the Eradication of Poverty | United Nations observance |
| Wednesday | 18 October | Alaska Day | State Holiday |
| Saturday | 21 October | Sweetest Day | Observance |
| Monday | 23 October | Dussehra | Hindu Holiday |
| Tuesday | 24 October | United Nations Day | United Nations observance |
| Tuesday | 24 October | World Development Information Day | United Nations observance |
| Friday | 27 October | World Day for Audiovisual Heritage | United Nations observance |
| Friday | 27 October | Nevada Day | State Holiday |
| Sunday | 29 October | World Stroke Day | Worldwide observance |
| Tuesday | 31 October | World Cities Day | United Nations observance |
| Tuesday | 31 October | Halloween | Observance |
| Wednesday | 01 November | All Saints' Day | Christian |
| Wednesday | 01 November | World Vegan Day | Worldwide observance |
| Wednesday | 01 November | First Day of Native American Heritage Month | Annual Monthly Observance |
| Thursday | 02 November | All Souls' Day | Christian |
| Thursday | 02 November | International Day to End Impunity for Crimes against Journalists | United Nations observance |
| Sunday | 05 November | World Tsunami Awareness Day | United Nations observance |
| Sunday | 05 November | New York City Marathon | Sporting event |
| Sunday | 05 November | Daylight Saving Time ends | Clock change/Daylight Saving Time |
| Monday | 06 November | International Day for Preventing the Exploitation of the Environment in War and Armed Conflict | United Nations observance |
| Tuesday | 07 November | Election Day | Observance |
| Tuesday | 07 November | Election Day | State Holiday |
| Friday | 10 November | World Science Day for Peace and Development | United Nations observance |
| Friday | 10 November | Marine Corps Birthday | Observance |
| Friday | 10 November | Veterans Day (substitute) | Federal Holiday |
| Friday | 10 November | Veterans Day (substitute) | State Holiday |
| Saturday | 11 November | Veterans Day | Federal Holiday |
| Saturday | 11 November | Veterans Day | State Holiday |
| Saturday | 11 November | Veterans Day | State Holiday |
| Sunday | 12 November | Diwali/Deepavali | Hindu Holiday |
| Sunday | 12 November | World Pneumonia Day | Worldwide observance |
| Monday | 13 November | Barack Obama Day | Local observance |
| Monday | 13 November | Veterans' Day/Armistice Day (substitute) | State Holiday |
| Tuesday | 14 November | World Diabetes Day | United Nations observance |
| Thursday | 16 November | International Day for Tolerance | United Nations observance |
| Thursday | 16 November | World Philosophy Day | United Nations observance |
| Friday | 17 November | World Prematurity Day | Worldwide observance |
| Sunday | 19 November | World Day of Remembrance for Road Traffic Victims | United Nations observance |
| Sunday | 19 November | World Toilet Day | United Nations observance |
| Sunday | 19 November | International Men's Day | Worldwide observance |
| Sunday | 19 November | George Rogers Clark Day | State Observance |
| Monday | 20 November | Universal Children's Day | United Nations observance |
| Monday | 20 November | Africa Industrialization Day | United Nations observance |
| Tuesday | 21 November | World Television Day | United Nations observance |
| Thursday | 23 November | Thanksgiving Day | Federal Holiday |
| Thursday | 23 November | Thanksgiving Day | State Holiday |
| Friday | 24 November | State Holiday | State Holiday |
| Friday | 24 November | Presidents' Day | State Holiday |
| Friday | 24 November | Lincoln's Birthday/Lincoln's Day | State Holiday |
| Friday | 24 November | Day After Thanksgiving | State Holiday |
| Friday | 24 November | Black Friday | Observance |
| Friday | 24 November | American Indian Heritage Day | State Holiday |
| Friday | 24 November | Native American Heritage Day | Observance |
| Friday | 24 November | Native American Heritage Day | State Holiday |
| Saturday | 25 November | International Day for the Elimination of Violence against Women | United Nations observance |
| Monday | 27 November | Cyber Monday | Observance |
| Tuesday | 28 November | Giving Tuesday | Observance |
| Wednesday | 29 November | International Day of Solidarity with the Palestinian People | United Nations observance |
| Wednesday | 29 November | Nellie Tayloe Ross's Birthday | State Observance |
| Thursday | 30 November | Day of Remembrance for all Victims of Chemical Warfare | United Nations observance |
| Friday | 01 December | World AIDS Day | United Nations observance |
| Friday | 01 December | Rosa Parks Day | State Observance |
| Friday | 01 December | Rosa Parks Day | Local observance |
| Saturday | 02 December | International Day for the Abolition of Slavery | United Nations observance |
| Sunday | 03 December | First Sunday of Advent | Christian |
| Sunday | 03 December | International Day of Persons with Disabilities | United Nations observance |
| Monday | 04 December | International Day of Banks | United Nations observance |
| Tuesday | 05 December | International Volunteer Day for Economic and Social Development | United Nations observance |
| Tuesday | 05 December | World Soil Day | United Nations observance |
| Wednesday | 06 December | St Nicholas Day | Observance |
| Thursday | 07 December | International Civil Aviation Day | United Nations observance |
| Thursday | 07 December | Pearl Harbor Remembrance Day | Observance |
| Thursday | 07 December | Pearl Harbor Remembrance Day | State Observance |
| Thursday | 07 December | Delaware Day | State Observance |
| Friday | 08 December | Feast of the Immaculate Conception | Christian |
| Friday | 08 December | Chanukah/Hanukkah (first day) | Jewish holiday |
| Saturday | 09 December | International Anti-Corruption Day | United Nations observance |
| Saturday | 09 December | World Genocide Commemoration Day | United Nations observance |
| Sunday | 10 December | Human Rights Day | United Nations observance |
| Sunday | 10 December | Wyoming Day | State Observance |
| Monday | 11 December | International Mountain Day | United Nations observance |
| Tuesday | 12 December | International Day of Neutrality | United Nations observance |
| Tuesday | 12 December | International Universal Health Coverage Day | United Nations observance |
| Tuesday | 12 December | Feast of Our Lady of Guadalupe | Christian |
| Wednesday | 13 December | National Guard Birthday | Observance |
| Friday | 15 December | Last Day of Chanukah | Jewish holiday |
| Friday | 15 December | Bill of Rights Day | Observance |
| Sunday | 17 December | Pan American Aviation Day | Observance |
| Sunday | 17 December | Wright Brothers Day | Observance |
| Monday | 18 December | International Migrants Day | United Nations observance |
| Monday | 18 December | Arabic Language Day | United Nations observance |
| Wednesday | 20 December | International Human Solidarity Day | United Nations observance |
| Thursday | 21 December | December Solstice | Season |
| Friday | 22 December | Asarah B'Tevet | Jewish holiday |
| Sunday | 24 December | Christmas Eve | State Holiday |
| Sunday | 24 December | Christmas Eve | Observance, Christian |
| Monday | 25 December | Christmas Day | State Holiday |
| Monday | 25 December | Christmas Day | Federal Holiday |
| Monday | 25 December | Christmas Eve observed | State Holiday |
| Tuesday | 26 December | Kwanzaa (first day) | Observance |
| Tuesday | 26 December | Day After Christmas Day | State Holiday |
| Wednesday | 27 December | International Day of Epidemic Preparedness | United Nations observance |
| Sunday | 31 December | New Year's Eve | Observance |
| Sunday | 31 December | New Year's Eve | State Holiday |
