| Jan 1 | New Year's Day |
| Jan 6 | Epiphany |
| Jan 13 | Stephen Foster Memorial Day |
| Jan 14 | The Prophet's Birthday |
| Jan 20 | Martin Luther King Jr. Day |
| Jan 27 | World Holocaust Victims Remembrance Day |
| Jan 29 | Kansas Day (Kansas) |
| Jan 31 | Lunar New Year |
| Feb 1 | National Freedom Day |
| Feb 1 | First Day of Black History Month |
| Feb 2 | Groundhog Day |
| Feb 5 | National Girls and Women in Sports Day |
| Feb 6 | International Day of Zero Tolerance for Female Genital Mutilation |
| Feb 7 | National Wear Red Day |
| Feb 13 | World Radio Day |
| Feb 14 | Valentine's Day |
| Feb 17 | Presidents' Day |
| Feb 20 | World Day of Social Justice |
| Feb 21 | International Mother Language Day |
| Feb 27 | Maha Shivaratri |
| Mar 1 | Zero Discrimination Day |
| Mar 1 | St. David's Day |
| Mar 1 | First Day of Women's History Month |
| Mar 1 | First Day of Irish American Heritage Month |
| Mar 3 | World Wildlife Day |
| Mar 3 | Read Across America Day |
| Mar 4 | Shrove Tuesday/Mardi Gras |
| Mar 5 | Ash Wednesday |
| Mar 7 | Employee Appreciation Day |
| Mar 8 | International Women's Day |
| Mar 16 | Holi |
| Mar 17 | St. Patrick's Day |
| Mar 20 | French Language Day |
| Mar 20 | International Day of Happiness |
| Mar 21 | World Day to Eliminate Racial Discrimination |
| Mar 21 | World Poetry Day |
| Mar 21 | International Day of Nowruz |
| Mar 21 | World Down Syndrome Day |
| Mar 21 | International Day of Forests |
| Mar 22 | World Water Day |
| Mar 23 | World Meteorological Day |
| Mar 24 | World Tuberculosis Day |
| Mar 24 | World Day for Truth concerning Human Rights Violations |
| Mar 25 | Day to Remember Slavery Victims and Transatlantic Slave Trade |
| Mar 25 | World Solidarity Day for Detained and Missing Workers |
| Mar 30 | Doctors' Day |
| Apr 2 | World Autism Awareness Day |
| Apr 4 | Mine Awareness Day |
| Apr 6 | International Sport Day |
| Apr 6 | National Tartan Day |
| Apr 7 | United Nations' World Health Day |
| Apr 7 | Day to Remember Rwanda Genocide Victims |
| Apr 12 | International Day of Human Space Flight |
| Apr 13 | Palm Sunday |
| Apr 13 | Thomas Jefferson's Birthday |
| Apr 14 | Passover Eve |
| Apr 15 | Passover (first day) |
| Apr 15 | Tax Day |
| Apr 15 | National Library Workers' Day |
| Apr 17 | Maundy Thursday |
| Apr 18 | Good Friday (Many regions) |
| Apr 19 | Holy Saturday |
| Apr 20 | Chinese Language Day |
| Apr 20 | Easter Sunday |
| Apr 21 | Easter Monday |
| Apr 22 | Last Day of Passover |
| Apr 22 | Earth Day |
| Apr 23 | World Book and Copyright Day |
| Apr 23 | World Spanish Language Day |
| Apr 23 | English Language Day |
| Apr 23 | Administrative Professionals Day |
| Apr 24 | International Girls in ICT Day |
| Apr 24 | Take our Daughters and Sons to Work Day |
| Apr 25 | World Malaria Day |
| Apr 26 | World Intellectual Property Day |
| Apr 28 | World Day for Safety and Health at Work |
| Apr 29 | Day to Remember Chemical Warfare Victims |
| Apr 30 | International Jazz Day |
| May 1 | Law Day |
| May 1 | Loyalty Day |
| May 1 | National Day of Prayer |
| May 1 | First Day of Military Appreciation Month |
| May 1 | First Day of Asian Pacific American Heritage Month |
| May 1 | First Day of Jewish American Heritage Month |
| May 3 | World Press Freedom Day |
| May 3 | National Explosive Ordnance Disposal (EOD) Day |
| May 5 | Cinco de Mayo |
| May 6 | National Nurses Day |
| May 6 | National Teacher Appreciation Day |
| May 8 | Time to Remember Lost Lives From World War II |
| May 8 | Victory in Europe Day |
| May 9 | Military Spouse Appreciation Day |
| May 10 | World Migratory Bird Day |
| May 11 | Mother's Day |
| May 13 | Vesak Day |
| May 15 | International Day of Families |
| May 15 | Peace Officers Memorial Day |
| May 16 | National Defense Transportation Day |
| May 17 | World Telecommunication and Information Society Day |
| May 17 | Armed Forces Day |
| May 21 | World Day for Cultural Diversity |
| May 21 | Emergency Medical Services for Children Day |
| May 22 | World Biological Diversity Day |
| May 22 | National Maritime Day |
| May 23 | International Day to End Obstetric Fistula |
| May 25 | National Missing Children's Day |
| May 26 | Memorial Day |
| May 27 | Isra and Mi'raj |
| May 29 | Ascension Day |
| May 29 | International Day of United Nations Peacekeepers |
| May 31 | World No Tobacco Day |
| Jun 1 | Global Day of Parents |
| Jun 1 | First Day of Pride Month |
| Jun 1 | First Day of Caribbean-American Heritage Month |
| Jun 4 | World Day for Child Victims of Aggression |
| Jun 5 | World Environment Day |
| Jun 6 | Day of the Russian Language |
| Jun 6 | D-Day |
| Jun 8 | Pentecost |
| Jun 8 | World Oceans Day |
| Jun 9 | Whit Monday |
| Jun 12 | World Day Against Child Labour |
| Jun 12 | Loving Day |
| Jun 14 | World Blood Donor Day |
| Jun 14 | Army Birthday |
| Jun 14 | Flag Day |
| Jun 15 | Trinity Sunday |
| Jun 15 | World Elder Abuse Awareness Day |
| Jun 15 | Father's Day |
| Jun 17 | World Day to Combat Desertification |
| Jun 19 | Juneteenth |
| Jun 19 | Corpus Christi |
| Jun 19 | Juneteenth Independence Day (Rhode Island) |
| Jun 20 | World Refugee Day |
| Jun 20 | American Eagle Day |
| Jun 21 | International Day of Yoga |
| Jun 23 | Public Service Day |
| Jun 23 | International Widows' Day |
| Jun 25 | Day of the Seafarer |
| Jun 26 | World Day against Drug Abuse and Trafficking |
| Jun 26 | World Day to Support Torture Victims |
| Jun 29 | First Day of Ramadan |
| Jul 4 | Independence Day |
| Jul 5 | International Day of Cooperatives |
| Jul 11 | World Population Day |
| Jul 14 | Bastille Day |
| Jul 18 | Nelson Mandela Day |
| Jul 24 | Lailat al-Qadr |
| Jul 27 | Parents' Day |
| Jul 27 | National Korean War Veterans Armistice Day |
| Jul 28 | World Hepatitis Day |
| Jul 30 | World Friendship Day |
| Jul 30 | World Day Against Trafficking in Persons |
| Aug 4 | Coast Guard Birthday |
| Aug 7 | Purple Heart Day |
| Aug 9 | World Indigenous Peoples’ Day |
| Aug 10 | Raksha Bandhan |
| Aug 12 | International Youth Day |
| Aug 15 | Assumption of Mary |
| Aug 16 | Janmashtami |
| Aug 17 | National Senior Citizens Day |
| Aug 19 | World Humanitarian Day |
| Aug 19 | National Aviation Day |
| Aug 23 | World Day for Slave Trade Abolition |
| Aug 26 | Women's Equality Day |
| Aug 29 | Ganesh Chaturthi |
| Aug 29 | International Day against Nuclear Tests |
| Aug 30 | World Day of Victims of Enforced Disappearance |
| Sep 1 | Labor Day |
| Sep 5 | International Day of Charity |
| Sep 6 | Carl Garner Federal Lands Cleanup Day |
| Sep 7 | National Grandparents Day |
| Sep 8 | International Literacy Day |
| Sep 11 | Patriot Day |
| Sep 12 | International South-South Cooperation Day |
| Sep 15 | International Day of Democracy |
| Sep 15 | First Day of National Hispanic Heritage Month |
| Sep 16 | World Ozone Layer Day |
| Sep 17 | Constitution Day and Citizenship Day |
| Sep 18 | Air Force Birthday |
| Sep 19 | National POW/MIA Recognition Day |
| Sep 21 | International Day of Peace |
| Sep 24 | Navratri |
| Sep 25 | Rosh Hashana |
| Sep 25 | World Maritime Day |
| Sep 26 | World Day to Eliminate Nuclear Weapons |
| Sep 27 | World Tourism Day |
| Sep 27 | National Public Lands Day |
| Sep 28 | Gold Star Mother's Day |
| Oct 1 | International Day of Older Persons |
| Oct 2 | International Day of Non-Violence |
| Oct 3 | Dussehra |
| Oct 4 | Feast of St Francis of Assisi |
| Oct 4 | Yom Kippur |
| Oct 4 | Eid al-Adha |
| Oct 5 | World Teachers' Day |
| Oct 6 | World Habitat Day |
| Oct 6 | German American Day |
| Oct 6 | Child Health Day |
| Oct 8 | World Day for Natural Disaster Reduction |
| Oct 9 | World Post Day |
| Oct 9 | Leif Erikson Day |
| Oct 10 | World Mental Health Day |
| Oct 11 | International Day of the Girl Child |
| Oct 13 | Navy Birthday |
| Oct 13 | Columbus Day |
| Oct 15 | Last Day of Sukkot |
| Oct 15 | International Day of Rural Women |
| Oct 15 | White Cane Safety Day |
| Oct 16 | World Food Day |
| Oct 16 | Boss's Day |
| Oct 17 | World Day for Poverty Eradication |
| Oct 18 | Sweetest Day (Many regions) |
| Oct 22 | Diwali/Deepavali |
| Oct 24 | United Nations Day |
| Oct 24 | World Development Information Day |
| Oct 25 | Muharram |
| Oct 27 | World Day for Audiovisual Heritage |
| Oct 31 | World Cities Day |
| Oct 31 | Halloween |
| Nov 1 | All Saints' Day |
| Nov 1 | First Day of Native American Heritage Month |
| Nov 2 | All Souls' Day |
| Nov 2 | International Day to End Impunity |
| Nov 3 | Ashura |
| Nov 4 | Election Day |
| Nov 6 | World Day to Protect the Environment in War |
| Nov 10 | World Science Day |
| Nov 10 | Marine Corps Birthday |
| Nov 11 | Veterans Day |
| Nov 14 | World Diabetes Day |
| Nov 16 | International Day for Tolerance |
| Nov 16 | World Day for Road Traffic Victims |
| Nov 19 | World COPD Day |
| Nov 19 | World Toilet Day |
| Nov 20 | Universal Children's Day |
| Nov 20 | Africa Industrialization Day |
| Nov 20 | World Philosophy Day |
| Nov 21 | World Television Day |
| Nov 25 | World Day to Eliminate Violence on Women |
| Nov 27 | Thanksgiving Day |
| Nov 28 | Black Friday |
| Nov 28 | Native American Heritage Day |
| Nov 29 | World Solidarity Day with Palestinian People |
| Nov 30 | First Sunday of Advent |
| Dec 1 | World AIDS Day |
| Dec 1 | Cyber Monday |
| Dec 2 | World Day for Slavery Abolition |
| Dec 2 | Giving Tuesday |
| Dec 3 | World Day for Persons with Disabilities |
| Dec 5 | International Volunteer Day |
| Dec 5 | World Soil Day |
| Dec 6 | St Nicholas Day |
| Dec 7 | International Civil Aviation Day |
| Dec 7 | Pearl Harbor Remembrance Day |
| Dec 8 | Feast of the Immaculate Conception |
| Dec 9 | International Anti-Corruption Day |
| Dec 10 | Human Rights Day |
| Dec 11 | International Mountain Day |
| Dec 12 | Feast of Our Lady of Guadalupe |
| Dec 13 | National Guard Birthday |
| Dec 15 | Bill of Rights Day |
| Dec 17 | Chanukah/Hanukkah (first day) |
| Dec 17 | Pan American Aviation Day |
| Dec 17 | Wright Brothers Day |
| Dec 18 | International Migrants Day |
| Dec 18 | Arabic Language Day |
| Dec 20 | International Human Solidarity Day |
| Dec 24 | Last Day of Chanukah |
| Dec 24 | Christmas Eve |
| Dec 25 | Christmas Day (All) |
| Dec 25 | Christmas Day |
| Dec 26 | Kwanzaa (first day) |
| Dec 31 | New Year's Eve |
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