Public holidays
1640, USA, Michigan
| # | Date | Public holiday |
|---|---|---|
| 1 | Sunday, 1 January 1640 | New Year's Day |
| Monday, 2 January 1640 | New Year's Day (observance) | |
| 2 | Monday, 16 January 1640 | Martin Luther King Day |
| 3 | Monday, 20 February 1640 | Washington's Birthday |
| 4 | Monday, 28 May 1640 | Memorial Day |
| 5 | Tuesday, 19 June 1640 | Juneteenth National Independence Day |
| 6 | Wednesday, 4 July 1640 | Independence Day |
| 7 | Monday, 3 September 1640 | Labor Day |
| 8 | Tuesday, 6 November 1640 | Election Day |
| 9 | Sunday, 11 November 1640 | Veterans Day |
| Monday, 12 November 1640 | Veterans Day (observance) | |
| 10 | Thursday, 22 November 1640 | Thanksgiving |
| 11 | Friday, 23 November 1640 | Black Friday |
| 12 | Monday, 24 December 1640 | Christmas Eve |
| 13 | Tuesday, 25 December 1640 | Christmas |
| 14 | Monday, 31 December 1640 | New Year's Eve |