Public holidays
1221, USA, Montana
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, January 1, 1221 | New Year's Day |
| 2 | Monday, January 18, 1221 | Martin Luther King Day |
| 3 | Friday, February 12, 1221 | Lincoln's Birthday |
| 4 | Monday, February 15, 1221 | Washington's Birthday/Susan B. Anthony Day |
| 5 | Monday, May 31, 1221 | Memorial Day |
| 6 | Sunday, July 4, 1221 | Independence Day |
| Monday, July 5, 1221 | Independence Day (observance) | |
| 7 | Monday, September 6, 1221 | Labor Day |
| 8 | Monday, October 11, 1221 | Columbus Day |
| 9 | Tuesday, November 2, 1221 | Election Day |
| 10 | Thursday, November 11, 1221 | Veterans Day |
| 11 | Thursday, November 25, 1221 | Thanksgiving |
| Friday, December 24, 1221 | Christmas (observance)/Christmas Eve | |
| 12 | Saturday, December 25, 1221 | Christmas |
| Friday, December 31, 1221 | New Year's Day (observance) |