Public holidays
1638, USA, District of Columbia
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, January 1, 1638 | New Year's Day |
| 2 | Monday, February 22, 1638 | Washington's Birthday |
| 3 | Friday, April 16, 1638 | Emancipation Day |
| 4 | Sunday, May 30, 1638 | Memorial Day |
| 5 | Sunday, July 4, 1638 | Independence Day |
| Monday, July 5, 1638 | Independence Day (observance) | |
| 6 | Monday, September 6, 1638 | Labor Day |
| Friday, December 24, 1638 | Christmas (observance)/Christmas Eve | |
| 7 | Saturday, December 25, 1638 | Christmas |
| Friday, December 31, 1638 | New Year's Day (observance) |