Public holidays
1780, USA, Maryland
| # | Date | Public holiday |
|---|---|---|
| 1 | Saturday, January 1, 1780 | New Year's Day |
| 2 | Monday, January 17, 1780 | Martin Luther King Day |
| 3 | Monday, February 21, 1780 | Washington's Birthday |
| 4 | Monday, May 29, 1780 | Memorial Day |
| 5 | Monday, June 19, 1780 | Juneteenth National Independence Day |
| 6 | Tuesday, July 4, 1780 | Independence Day |
| 7 | Monday, September 4, 1780 | Labor Day |
| 8 | Monday, October 9, 1780 | Columbus Day |
| 9 | Tuesday, November 7, 1780 | Election Day |
| Friday, November 10, 1780 | Veterans Day (observance) | |
| 10 | Saturday, November 11, 1780 | Veterans Day |
| 11 | Thursday, November 23, 1780 | Thanksgiving |
| 12 | Friday, November 24, 1780 | Black Friday |
| 13 | Monday, December 25, 1780 | Christmas |