| Jan 1 | New Year's Day |
| Jan 6 | Epiphany |
| Jan 7 | International Programmers' Day |
| Jan 7 | Orthodox Christmas Day |
| Jan 13 | Stephen Foster Memorial Day |
| Jan 14 | Orthodox New Year |
| Jan 15 | Lee Jackson Day (Virginia) |
| Jan 18 | Martin Luther King Day |
| Jan 18 | Idaho Human Rights Day (Idaho) |
| Jan 18 | Civil Rights Day (Arizona, New Hampshire) |
| Jan 18 | Robert E Lee's Birthday (AL, AR, GA, MS) |
| Jan 19 | Robert E Lee's Birthday (Florida) |
| Jan 19 | Confederate Memorial Day (Texas) |
| Jan 27 | World Holocaust Victims Remembrance Day |
| Jan 27 | e-Day |
| Jan 29 | Kansas Day |
| Jan 30 | Tu B'Shevat (Arbor Day) |
| Feb 1 | National Freedom Day |
| Feb 2 | Groundhog Day |
| Feb 4 | World Cancer Day |
| Feb 7 | e-Day |
| Feb 12 | Lincoln's Birthday (CT, IL, MO, NJ, NY) |
| Feb 14 | Valentine's Day |
| Feb 14 | Chinese New Year |
| Feb 15 | Daisy Gatson Bates Day (Arkansas) |
| Feb 15 | Presidents' Day |
| Feb 16 | Shrove Tuesday/Mardi Gras (Alabama, Louisiana) |
| Feb 16 | Shrove Tuesday/Mardi Gras |
| Feb 17 | Ash Wednesday |
| Feb 20 | World Day of Social Justice |
| Feb 21 | International Mother Language Day |
| Feb 26 | Prophet's Birthday |
| Feb 28 | Purim |
| Mar 1 | Self-injury Awareness Day |
| Mar 1 | Casimir Pulaski Day (Illinois) |
| Mar 1 | St. David's Day |
| Mar 2 | Texas Independence Day (Texas) |
| Mar 2 | Town Meeting Day Vermont |
| Mar 2 | Read Across America Day |
| Mar 8 | International Women's Day |
| Mar 11 | World Kidney Day |
| Mar 14 | Pi Day |
| Mar 14 | Daylight Saving Time starts |
| Mar 17 | Evacuation Day (Massachusetts) |
| Mar 17 | St. Patrick's Day |
| Mar 20 | March equinox |
| Mar 21 | World Day to Eliminate Racial Discrimination |
| Mar 21 | International Day of Nowruz |
| Mar 21 | World Poetry Day |
| Mar 22 | World Water Day |
| Mar 23 | World Meteorological Day |
| Mar 24 | World Tuberculosis Day |
| Mar 25 | Day to Remember Slavery Victims and Transatlantic Slave Trade |
| Mar 25 | World Solidarity Day for Detained and Missing Workers |
| Mar 25 | Maryland Day (Maryland) |
| Mar 26 | Prince Jonah Kuhio Kalanianaole Day (Hawaii) |
| Mar 27 | Earth Hour |
| Mar 28 | Palm Sunday |
| Mar 29 | Seward's Day (Alaska) |
| Mar 30 | First day of Passover |
| Mar 31 | César Chávez Day (CA, CO*, TX*) |
| Apr 1 | Maundy Thursday |
| Apr 1 | April Fool's Day |
| Apr 2 | Orthodox Good Friday |
| Apr 2 | Good Friday (14 states) |
| Apr 2 | Pascua Florida Day (Florida) |
| Apr 2 | World Autism Awareness Day |
| Apr 3 | Holy Saturday |
| Apr 3 | Orthodox Holy Saturday |
| Apr 4 | United Nations' Mine Awareness Day |
| Apr 4 | Orthodox Easter |
| Apr 4 | Easter Sunday |
| Apr 5 | Easter Monday |
| Apr 5 | Orthodox Easter Monday |
| Apr 6 | Last day of Passover |
| Apr 6 | National Tartan Day |
| Apr 7 | Day to Remember Rwanda Genocide Victims |
| Apr 7 | United Nations' World Health Day |
| Apr 11 | Yom HaShoah |
| Apr 15 | Father Damien Day (Hawaii) |
| Apr 15 | Tax Day |
| Apr 16 | Emancipation Day (District of Columbia) |
| Apr 19 | Patriot's Day (Maine, Massachusetts) |
| Apr 20 | Yom HaAtzmaut |
| Apr 21 | Administrative Professionals Day |
| Apr 21 | San Jacinto Day (Texas) |
| Apr 22 | Earth Day |
| Apr 22 | Oklahoma Day (Oklahoma) |
| Apr 23 | World Book and Copyright Day |
| Apr 25 | World Malaria Day |
| Apr 26 | Confederate Memorial Day (AL, FL, GA) |
| Apr 26 | Confederate Memorial Day (Mississippi) |
| Apr 26 | World Intellectual Property Day |
| Apr 28 | World Day for Safety and Health at Work |
| Apr 30 | Arbor Day (Nebraska) |
| May 1 | Loyalty Day |
| May 1 | Law Day |
| May 2 | Lag B'Omer |
| May 3 | World Press Freedom Day |
| May 4 | Primary Election Day Indiana (Indiana) |
| May 4 | Rhode Island Independence Day (Rhode Island) |
| May 5 | Cinco de Mayo |
| May 6 | National Nurses Day |
| May 6 | National Day of Prayer |
| May 7 | 'Truman Day' observed (Missouri) |
| May 8 | Time to Remember Lost Lives From World War II |
| May 8 | Truman Day (Missouri) |
| May 8 | World Migratory Bird Day |
| May 9 | Mother's Day |
| May 10 | Confederate Memorial Day (North Carolina, South Carolina) |
| May 11 | Primary Election Day West Virginia (West Virginia) |
| May 13 | Ascension Day |
| May 15 | Armed Forces Day |
| May 15 | International Day of Families |
| May 15 | Peace Officers Memorial Day |
| May 17 | World Information Society Day |
| May 19 | Shavuot |
| May 19 | Emergency Medical Services for Children Day |
| May 21 | World Day for Cultural Diversity |
| May 21 | National Defense Transportation Day |
| May 22 | World Biological Diversity Day |
| May 22 | National Maritime Day |
| May 22 | Harvey Milk Day (California) |
| May 23 | Pentecost |
| May 24 | Whit Monday |
| May 25 | African Liberation Day |
| May 25 | National Missing Children's Day |
| May 25 | Towel Day |
| May 29 | International Day of United Nations Peacekeepers |
| May 30 | Trinity Sunday |
| May 31 | Jefferson Davis Birthday (Mississippi) |
| May 31 | World No Tobacco Day |
| May 31 | Memorial Day |
| Jun 1 | Statehood Day (Kentucky, Tennessee) |
| Jun 3 | Jefferson Davis Birthday (Florida) |
| Jun 3 | Corpus Christi |
| Jun 4 | World Day for Child Victims of Aggression |
| Jun 5 | World Environment Day |
| Jun 7 | Jefferson Davis Birthday (Alabama) |
| Jun 11 | Kamehameha Day (Hawaii) |
| Jun 14 | Flag Day |
| Jun 17 | World Day to Combat Desertification |
| Jun 17 | Bunker Hill Day (Massachusetts) |
| Jun 19 | Juneteenth (All except AL, American Samoa, GA, HI, MD, ME, MP, MS, MT, ND, NH, NV, PA, RI, SD, UT, Virgin Islands, Wake Island) |
| Jun 20 | West Virginia Day (West Virginia) |
| Jun 20 | Father's Day |
| Jun 20 | World Refugee Day |
| Jun 21 | 'West Virginia Day' observed (West Virginia) |
| Jun 21 | June Solstice |
| Jun 23 | Public Service Day |
| Jun 26 | World Day to Support Torture Victims |
| Jun 26 | World Day against Drug Abuse and Trafficking |
| Jul 3 | International Day of Cooperatives |
| Jul 4 | Independence Day |
| Jul 5 | 'Independence Day' observed |
| Jul 9 | Isra and Mi'raj |
| Jul 11 | World Population Day |
| Jul 18 | Nelson Mandela Day |
| Jul 20 | Tisha B'Av |
| Jul 22 | Pi Approximation Day |
| Jul 23 | 'Pioneer Day' observed (Utah) |
| Jul 24 | Pioneer Day (Utah) |
| Jul 25 | Parents' Day |
| Aug 9 | Victory Day (Rhode Island) |
| Aug 9 | World Indigenous Peoples’ Day |
| Aug 11 | Ramadan begins |
| Aug 12 | International Youth Day |
| Aug 15 | Assumption of Mary |
| Aug 16 | Bennington Battle Day (Vermont) |
| Aug 19 | World Humanitarian Day |
| Aug 19 | National Aviation Day |
| Aug 20 | Statehood Day in Hawaii (Hawaii) |
| Aug 21 | Senior Citizens Day |
| Aug 23 | World Day for Slave Trade Abolition |
| Aug 27 | Lyndon Baines Johnson Day (Texas) |
| Aug 29 | International Day against Nuclear Tests |
| Sep 5 | Laylat al-Qadr |
| Sep 6 | Labor Day |
| Sep 8 | International Literacy Day |
| Sep 9 | Rosh Hashana |
| Sep 10 | Eid-al-Fitr |
| Sep 10 | World Suicide Prevention Day |
| Sep 11 | Patriot Day |
| Sep 11 | Carl Garner Federal Lands Cleanup Day |
| Sep 12 | National Grandparents Day |
| Sep 13 | International Programmers' Day |
| Sep 15 | International Day of Democracy |
| Sep 16 | World Ozone Layer Day |
| Sep 17 | National POW/MIA Recognition Day |
| Sep 17 | Constitution Day and Citizenship Day |
| Sep 18 | Yom Kippur |
| Sep 19 | International Talk Like a Pirate Day |
| Sep 21 | International Day of Peace |
| Sep 22 | Emancipation Day (Ohio) |
| Sep 23 | First day of Sukkot |
| Sep 23 | World Maritime Day |
| Sep 26 | Gold Star Mother's Day |
| Sep 26 | World Heart Day |
| Sep 27 | World Tourism Day |
| Sep 28 | World Rabies Day |
| Sep 29 | Last day of Sukkot |
| Sep 30 | Shmini Atzeret/Simchat Torah |
| Oct 1 | International Day of Older Persons |
| Oct 2 | International Day of Non-Violence |
| Oct 4 | Feast of St Francis of Assisi |
| Oct 4 | World Habitat Day |
| Oct 4 | Child Health Day |
| Oct 5 | World Teachers' Day |
| Oct 9 | Leif Erikson Day |
| Oct 9 | World Post Day |
| Oct 10 | World Mental Health Day |
| Oct 11 | Indigenous People's Day (California) |
| Oct 11 | Native Americans' Day (South Dakota) |
| Oct 11 | Columbus Day (All except CA, HI, NV) |
| Oct 13 | World Day for Natural Disaster Reduction |
| Oct 14 | World Sight Day |
| Oct 15 | Boss's Day |
| Oct 15 | White Cane Safety Day |
| Oct 15 | International Day of Rural Women |
| Oct 16 | World Food Day |
| Oct 17 | World Day for Poverty Eradication |
| Oct 18 | Alaska Day (Alaska) |
| Oct 24 | World Development Information Day |
| Oct 24 | United Nations Day |
| Oct 27 | World Day for Audiovisual Heritage |
| Oct 29 | World Stroke Day |
| Oct 29 | Nevada Day (Nevada) |
| Oct 31 | Halloween |
| Nov 1 | All Saints' Day |
| Nov 2 | Election Day (DE, HI, IL, IN, LA, MD, MI, MT, NY, WV) |
| Nov 2 | All Souls' Day |
| Nov 4 | Return Day Delaware (Delaware) |
| Nov 5 | Diwali/Deepavali |
| Nov 6 | World Day to Protect the Environment in War |
| Nov 7 | Daylight Saving Time ends |
| Nov 10 | World Science Day |
| Nov 11 | Veterans Day |
| Nov 14 | World Diabetes Day |
| Nov 16 | International Day for Tolerance |
| Nov 17 | Eid-al-Adha |
| Nov 17 | World COPD Day |
| Nov 18 | World Philosophy Day |
| Nov 19 | International Men's Day |
| Nov 20 | Universal Children's Day |
| Nov 20 | Africa Industrialization Day |
| Nov 21 | World Television Day |
| Nov 21 | World Day for Road Traffic Victims |
| Nov 25 | Thanksgiving Day |
| Nov 25 | World Day to Eliminate Violence on Women |
| Nov 26 | American Indian Heritage Day (Maryland) |
| Nov 26 | Lincoln's Birthday (Indiana) |
| Nov 26 | Presidents' Day (New Mexico) |
| Nov 26 | Black Friday (17 states) |
| Nov 28 | First Sunday Advent |
| Nov 29 | Cyber Monday |
| Nov 29 | World Solidarity Day with Palestinian People |
| Dec 1 | World AIDS Day |
| Dec 2 | First Day of Hanukkah |
| Dec 2 | World Day for Slavery Abolition |
| Dec 3 | World Day for Persons with Disabilities |
| Dec 5 | International Volunteer Day |
| Dec 7 | International Civil Aviation Day |
| Dec 7 | Pearl Harbor Remembrance Day |
| Dec 8 | Feast of the Immaculate Conception |
| Dec 8 | Muharram/Islamic New Year |
| Dec 9 | Last day of Hanukkah |
| Dec 9 | International Anti-Corruption Day |
| Dec 10 | Human Rights Day |
| Dec 11 | International Mountain Day |
| Dec 17 | Wright Brothers Day |
| Dec 17 | Pan American Aviation Day |
| Dec 18 | International Migrants Day |
| Dec 19 | International South-South Cooperation Day |
| Dec 20 | International Human Solidarity Day |
| Dec 21 | December Solstice |
| Dec 23 | Presidents' Day (Indiana) |
| Dec 24 | Christmas Eve |
| Dec 24 | 'Christmas Day' observed |
| Dec 25 | Christmas Day |
| Dec 26 | Kwanzaa (until Jan 1) |
| Dec 31 | New Year's Eve |
| Dec 31 | 'New Year's Day' observed |
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