Public holidays
1820, USA, Delaware
| # | Date | Public holiday |
|---|---|---|
| 1 | Saturday, January 1, 1820 | New Year's Day |
| 2 | Monday, January 17, 1820 | Martin Luther King Day |
| 3 | Friday, March 31, 1820 | César Chávez Day/Good Friday |
| 4 | Monday, May 29, 1820 | Memorial Day |
| 5 | Monday, June 19, 1820 | Juneteenth National Independence Day |
| 6 | Tuesday, July 4, 1820 | Independence Day |
| 7 | Monday, September 4, 1820 | Labor Day |
| Friday, November 10, 1820 | Veterans Day (observance) | |
| 8 | Saturday, November 11, 1820 | Veterans Day |
| 9 | Thursday, November 23, 1820 | Thanksgiving |
| 10 | Friday, November 24, 1820 | Black Friday |
| 11 | Monday, December 25, 1820 | Christmas |