Public holidays
1551, USA, South Dakota
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, 1 January 1551 | New Year's Day |
| 2 | Monday, 15 January 1551 | Martin Luther King Day |
| 3 | Monday, 19 February 1551 | Washington's Birthday |
| 4 | Monday, 28 May 1551 | Memorial Day |
| 5 | Wednesday, 4 July 1551 | Independence Day |
| 6 | Monday, 3 September 1551 | Labor Day |
| 7 | Sunday, 11 November 1551 | Veterans Day |
| Monday, 12 November 1551 | Veterans Day (observance) | |
| 8 | Thursday, 22 November 1551 | Thanksgiving |
| 9 | Tuesday, 25 December 1551 | Christmas |