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