Public holidays
1778, USA, South Dakota
| # | Date | Public holiday |
|---|---|---|
| 1 | Thursday, 1 January 1778 | New Year's Day |
| 2 | Monday, 19 January 1778 | Martin Luther King Day |
| Monday, 16 February 1778 | Washington's Birthday/Susan B. Anthony Day (observance) | |
| 3 | Monday, 25 May 1778 | Memorial Day |
| Friday, 3 July 1778 | Independence Day (observance) | |
| 4 | Saturday, 4 July 1778 | Independence Day |
| 5 | Monday, 7 September 1778 | Labor Day |
| 6 | Wednesday, 11 November 1778 | Veterans Day |
| 7 | Thursday, 26 November 1778 | Thanksgiving |
| 8 | Friday, 25 December 1778 | Christmas |