January
- January 16 - MLK Day
- January 22 - Lunar New Year
- January 22 - Chinese New Year
- January 23 - UN Holocaust Memorial Day
February
- February 1 to February 28 - Black History Month
- February 22 - Ash Wednesday
March
- March 1 to March 31 - National Women’s History Month
- March 8 - Holi
- March 21 - Iranian New Year
- March 22 to April 21 - Ramadan
April
- April 1 to April 30 - Genocide Awareness Month
- April 1 to April 30 - Minority Health Month
- April 5 to April 13 - Passover
- April 7 - Good Friday
- April 9 - Easter
- April 18 - Laylat Al Qadr
- April 21 to April 22 - Eid al Fitr
May
- May 1 to May 31 - Asian & Pacific American Heritage Month
- May 1 to May 31 - Jewish American Heritage Month
- May 21 - World Day for Cultural Diversity
June
- June 1 to June 30 - LGBTQ+ Pride Month
- June 19 - Juneteenth
- June 28 to June 29 - Eid al Adha
July
- July 27 to July 28 - Ashura
August
- August 26 - Women’s Equality Day
September
- September 15 to September 17 - Rosh Hashanah
- September 15 to October 15 - National Hispanic Heritage Month
- September 24 to September 25 - Yom Kippur
- September 29 to October 6 - Sukkot
October
- October 1 to October 30 - Polish American History Month
- October 9 - Indigenous People’s Day
- October 10 - Indigenous People’s Day
- October 23 - Dussehra
November
- November 1 to November 30 - National American Indian Heritage Month
- November 9 - Veteran’s Day
- November 12 - Diwali
December
- December 3 - International Day of Persons with Disabilities
- December 7 to December 15 - Hanukkah
- December 25 - Christmas Day
- December 26 - Kwanzaa