Public holidays
1646, USA, South Dakota
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, January 1, 1646 | New Year's Day |
| 2 | Monday, January 15, 1646 | Martin Luther King Day |
| 3 | Monday, February 19, 1646 | Washington's Birthday |
| 4 | Monday, May 28, 1646 | Memorial Day |
| 5 | Wednesday, July 4, 1646 | Independence Day |
| 6 | Monday, September 3, 1646 | Labor Day |
| 7 | Sunday, November 11, 1646 | Veterans Day |
| Monday, November 12, 1646 | Veterans Day (observance) | |
| 8 | Thursday, November 22, 1646 | Thanksgiving |
| 9 | Tuesday, December 25, 1646 | Christmas |