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