Public holidays
1990, USA, Oklahoma
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, January 1, 1990 | New Year's Day |
| 2 | Monday, January 15, 1990 | Martin Luther King Day |
| 3 | Monday, February 19, 1990 | Washington's Birthday |
| 4 | Monday, May 28, 1990 | Memorial Day |
| 5 | Tuesday, June 19, 1990 | Juneteenth National Independence Day |
| 6 | Wednesday, July 4, 1990 | Independence Day |
| 7 | Monday, September 3, 1990 | Labor Day |
| 8 | Sunday, November 11, 1990 | Veterans Day |
| Monday, November 12, 1990 | Veterans Day (observance) | |
| 9 | Thursday, November 22, 1990 | Thanksgiving |
| 10 | Friday, November 23, 1990 | Black Friday |
| 11 | Monday, December 24, 1990 | Christmas Eve |
| 12 | Tuesday, December 25, 1990 | Christmas |