The holidays and the days they are observed are:
- New Year's Day, January 1.
- Martin Luther King, Jr. Day, Third Monday in January.
- President's Day, Third Monday in February.
- Memorial Day, Last Monday in May.
- Independence Day, July 4.
- Labor Day, First Monday in September.
- General Election Day, even-numbered years
- Veterans Day, November 11.
- Thanksgiving Day and the day after, the fourth Thursday and Friday in November.
- Christmas Eve and Christmas Day, December 24 and 25.
- New Year's Eve, December 31.
The calendar dates for 2021 are:
- January 1
- January 18
- February 15
- May 31
- July 5
- September 6
- November 11
- November 25 and 26
- December 23 and 24
- December 30 and 31
State office closings for state holidays are regulated by the Michigan Department of Civil Service Regulation 5.08.
Public Act 124 of 1865 is the Michigan law governing official state holidays.