Public holidays
1540, USA, South Dakota
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, 1 January 1540 | New Year's Day |
| 2 | Monday, 15 January 1540 | Martin Luther King Day |
| 3 | Monday, 19 February 1540 | Washington's Birthday |
| 4 | Monday, 27 May 1540 | Memorial Day |
| 5 | Thursday, 4 July 1540 | Independence Day |
| 6 | Monday, 2 September 1540 | Labor Day |
| 7 | Monday, 11 November 1540 | Veterans Day |
| 8 | Thursday, 28 November 1540 | Thanksgiving |
| 9 | Wednesday, 25 December 1540 | Christmas |