Public holidays
2231, USA, Montana
| # | Date | Public holiday |
|---|---|---|
| 1 | Saturday, 1 January 2231 | New Year's Day |
| 2 | Monday, 17 January 2231 | Martin Luther King Day |
| Friday, 11 February 2231 | Lincoln's Birthday (observance) | |
| 3 | Saturday, 12 February 2231 | Lincoln's Birthday |
| 4 | Monday, 21 February 2231 | Washington's Birthday |
| 5 | Monday, 30 May 2231 | Memorial Day |
| 6 | Monday, 4 July 2231 | Independence Day |
| 7 | Monday, 5 September 2231 | Labor Day |
| 8 | Monday, 10 October 2231 | Columbus Day |
| 9 | Tuesday, 8 November 2231 | Election Day |
| 10 | Friday, 11 November 2231 | Veterans Day |
| 11 | Thursday, 24 November 2231 | Thanksgiving |
| 12 | Sunday, 25 December 2231 | Christmas |
| Monday, 26 December 2231 | Christmas (observance) |