Public holidays
1231, USA, Federal holidays
| # | Date | Public holiday |
|---|---|---|
| 1 | Wednesday, January 1, 1231 | New Year's Day |
| 2 | Monday, January 20, 1231 | Martin Luther King Day |
| 3 | Monday, February 17, 1231 | Washington's Birthday |
| 4 | Monday, May 26, 1231 | Memorial Day |
| 5 | Friday, July 4, 1231 | Independence Day |
| 6 | Monday, September 1, 1231 | Labor Day |
| 7 | Monday, October 13, 1231 | Columbus Day |
| 8 | Tuesday, November 11, 1231 | Veterans Day |
| 9 | Thursday, November 27, 1231 | Thanksgiving |
| 10 | Thursday, December 25, 1231 | Christmas |