Public holidays
1663, USA, Montana
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, January 1, 1663 | New Year's Day |
| 2 | Monday, February 12, 1663 | Lincoln's Birthday |
| 3 | Thursday, February 22, 1663 | Washington's Birthday |
| 4 | Wednesday, May 30, 1663 | Memorial Day |
| 5 | Wednesday, July 4, 1663 | Independence Day |
| 6 | Monday, September 3, 1663 | Labor Day |
| 7 | Tuesday, November 6, 1663 | Election Day |
| 8 | Tuesday, December 25, 1663 | Christmas |