Public holidays
1631, USA, Montana
| # | Date | Public holiday |
|---|---|---|
| 1 | Wednesday, January 1, 1631 | New Year's Day |
| 2 | Monday, January 20, 1631 | Martin Luther King Day |
| 3 | Wednesday, February 12, 1631 | Lincoln's Birthday |
| 4 | Monday, February 17, 1631 | Washington's Birthday |
| 5 | Monday, May 26, 1631 | Memorial Day |
| 6 | Friday, July 4, 1631 | Independence Day |
| 7 | Monday, September 1, 1631 | Labor Day |
| 8 | Monday, October 13, 1631 | Columbus Day |
| 9 | Tuesday, November 4, 1631 | Election Day |
| 10 | Tuesday, November 11, 1631 | Veterans Day |
| 11 | Thursday, November 27, 1631 | Thanksgiving |
| 12 | Thursday, December 25, 1631 | Christmas |