Public holidays
1780, USA, Oklahoma
| # | Date | Public holiday |
|---|---|---|
| 1 | Saturday, 1 January 1780 | New Year's Day |
| 2 | Monday, 17 January 1780 | Martin Luther King Day |
| 3 | Monday, 21 February 1780 | Washington's Birthday |
| 4 | Monday, 29 May 1780 | Memorial Day |
| 5 | Monday, 19 June 1780 | Juneteenth National Independence Day |
| 6 | Tuesday, 4 July 1780 | Independence Day |
| 7 | Monday, 4 September 1780 | Labor Day |
| Friday, 10 November 1780 | Veterans Day (observance) | |
| 8 | Saturday, 11 November 1780 | Veterans Day |
| 9 | Thursday, 23 November 1780 | Thanksgiving |
| 10 | Friday, 24 November 1780 | Black Friday |
| 11 | Sunday, 24 December 1780 | Christmas Eve |
| 12 | Monday, 25 December 1780 | Christmas |