May is Asian/Pacific American Heritage Month, and Jewish American Heritage Month
- May 1 – May Day
- May 2 – World Ukulele Day
- May 3 – Natl Teacher Day
- May 5 – Cinco de Mayo
- May 8 – Mothers’ Day
- May 30 – Memorial Day: National Military Appreciation
- May 31 – Anniversary of Tulsa Massacre
— (submitted by AntiRacism Group)