Public holidays
1991, USA, South Dakota
| # | Date | Public holiday |
|---|---|---|
| 1 | Tuesday, 1 January 1991 | New Year's Day |
| 2 | Monday, 21 January 1991 | Martin Luther King Day |
| 3 | Monday, 18 February 1991 | Washington's Birthday |
| 4 | Monday, 27 May 1991 | Memorial Day |
| 5 | Thursday, 4 July 1991 | Independence Day |
| 6 | Monday, 2 September 1991 | Labor Day |
| 7 | Monday, 11 November 1991 | Veterans Day |
| 8 | Thursday, 28 November 1991 | Thanksgiving |
| 9 | Wednesday, 25 December 1991 | Christmas |