Public holidays
1966, USA, Montana
| # | Date | Public holiday |
|---|---|---|
| 1 | Saturday, January 1, 1966 | New Year's Day |
| 2 | Monday, January 17, 1966 | Martin Luther King Day |
| Friday, February 11, 1966 | Lincoln's Birthday (observance) | |
| 3 | Saturday, February 12, 1966 | Lincoln's Birthday |
| 4 | Monday, February 21, 1966 | Washington's Birthday |
| 5 | Monday, May 30, 1966 | Memorial Day |
| 6 | Monday, July 4, 1966 | Independence Day |
| 7 | Monday, September 5, 1966 | Labor Day |
| 8 | Monday, October 10, 1966 | Columbus Day |
| 9 | Tuesday, November 8, 1966 | Election Day |
| 10 | Friday, November 11, 1966 | Veterans Day |
| 11 | Thursday, November 24, 1966 | Thanksgiving |
| 12 | Sunday, December 25, 1966 | Christmas |
| Monday, December 26, 1966 | Christmas (observance) |