Public holidays
1657, USA, South Dakota
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, 1 January 1657 | New Year's Day |
| 2 | Monday, 15 January 1657 | Martin Luther King Day |
| 3 | Monday, 19 February 1657 | Washington's Birthday |
| 4 | Monday, 28 May 1657 | Memorial Day |
| 5 | Wednesday, 4 July 1657 | Independence Day |
| 6 | Monday, 3 September 1657 | Labor Day |
| 7 | Sunday, 11 November 1657 | Veterans Day |
| Monday, 12 November 1657 | Veterans Day (observance) | |
| 8 | Thursday, 22 November 1657 | Thanksgiving |
| 9 | Tuesday, 25 December 1657 | Christmas |