Public holidays
1978, USA, South Dakota
| # | Date | Public holiday |
|---|---|---|
| 1 | Sunday, January 1, 1978 | New Year's Day |
| Monday, January 2, 1978 | New Year's Day (observance) | |
| 2 | Monday, January 16, 1978 | Martin Luther King Day |
| 3 | Monday, February 20, 1978 | Washington's Birthday |
| 4 | Monday, May 29, 1978 | Memorial Day |
| 5 | Tuesday, July 4, 1978 | Independence Day |
| 6 | Monday, September 4, 1978 | Labor Day |
| Friday, November 10, 1978 | Veterans Day (observance) | |
| 7 | Saturday, November 11, 1978 | Veterans Day |
| 8 | Thursday, November 23, 1978 | Thanksgiving |
| 9 | Monday, December 25, 1978 | Christmas |