Below is the list of U.S. Federal Holidays in 2021.
| Friday, January 1 | New Year’s Day |
| Monday, January 18 | Birthday of Martin Luther King Jr. |
| Wednesday, January 20 | Inauguration Day (for federal employees in the inauguration area – does not apply to Monart) |
| Monday, February 15 | Washington’s Birthday (Presidents’ Day) |
| Monday, May 31 | Memorial Day |
| Monday, July 5 | Independence Day |
| Monday, September 6 | Labor Day |
| Monday, October 11 | Columbus Day |
| Thursday, November 11 | Veterans Day |
| Thursday, November 25 | Thanksgiving Day |
| Friday, December 24 | Christmas Day |
| Friday, December 31 | New Year’s Day |