Public holidays
1966, USA, South Dakota
| # | Date | Public holiday |
|---|---|---|
| 1 | Saturday, 1 January 1966 | New Year's Day |
| 2 | Monday, 17 January 1966 | Martin Luther King Day |
| 3 | Monday, 21 February 1966 | Washington's Birthday |
| 4 | Monday, 30 May 1966 | Memorial Day |
| 5 | Monday, 4 July 1966 | Independence Day |
| 6 | Monday, 5 September 1966 | Labor Day |
| 7 | Friday, 11 November 1966 | Veterans Day |
| 8 | Thursday, 24 November 1966 | Thanksgiving |
| 9 | Sunday, 25 December 1966 | Christmas |
| Monday, 26 December 1966 | Christmas (observance) |