Public holidays
1638, USA, Missouri
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1638 | New Year's Day |
| 2 | Friday, 12 February 1638 | Lincoln's Birthday |
| 3 | Monday, 22 February 1638 | Washington's Birthday |
| Friday, 7 May 1638 | Truman Day (observance) | |
| 4 | Saturday, 8 May 1638 | Truman Day |
| 5 | Sunday, 30 May 1638 | Memorial Day |
| 6 | Sunday, 4 July 1638 | Independence Day |
| Monday, 5 July 1638 | Independence Day (observance) | |
| 7 | Monday, 6 September 1638 | Labor Day |
| Friday, 24 December 1638 | Christmas (observance)/Christmas Eve | |
| 8 | Saturday, 25 December 1638 | Christmas |
| Friday, 31 December 1638 | New Year's Day (observance) |