Public holidays
1644, USA, California
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1644 | New Year's Day |
| 2 | Thursday, 4 February 1644 | Rosa Parks Day |
| 3 | Monday, 22 February 1644 | Washington's Birthday |
| 4 | Thursday, 31 March 1644 | César Chávez Day |
| 5 | Monday, 30 May 1644 | Memorial Day |
| 6 | Monday, 4 July 1644 | Independence Day |
| 7 | Monday, 5 September 1644 | Labor Day |
| 8 | Sunday, 25 December 1644 | Christmas |
| Monday, 26 December 1644 | Christmas (observance) |