Public holidays
1440, USA, South Dakota
| # | Date | Public holiday |
|---|---|---|
| 1 | Wednesday, January 1, 1440 | New Year's Day |
| 2 | Monday, January 20, 1440 | Martin Luther King Day |
| 3 | Monday, February 17, 1440 | Washington's Birthday |
| 4 | Monday, May 25, 1440 | Memorial Day |
| Friday, July 3, 1440 | Independence Day (observance) | |
| 5 | Saturday, July 4, 1440 | Independence Day |
| 6 | Monday, September 7, 1440 | Labor Day |
| 7 | Wednesday, November 11, 1440 | Veterans Day |
| 8 | Thursday, November 26, 1440 | Thanksgiving |
| 9 | Friday, December 25, 1440 | Christmas |