Public holidays
1623, USA, South Dakota
| # | Date | Public holiday |
|---|---|---|
| 1 | Sunday, 1 January 1623 | New Year's Day |
| Monday, 2 January 1623 | New Year's Day (observance) | |
| 2 | Monday, 16 January 1623 | Martin Luther King Day |
| 3 | Monday, 20 February 1623 | Washington's Birthday |
| 4 | Monday, 29 May 1623 | Memorial Day |
| 5 | Tuesday, 4 July 1623 | Independence Day |
| 6 | Monday, 4 September 1623 | Labor Day |
| Friday, 10 November 1623 | Veterans Day (observance) | |
| 7 | Saturday, 11 November 1623 | Veterans Day |
| 8 | Thursday, 23 November 1623 | Thanksgiving |
| 9 | Monday, 25 December 1623 | Christmas |