Public holidays
1663, USA, Colorado
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, 1 January 1663 | New Year's Day |
| 2 | Thursday, 22 February 1663 | Washington's Birthday |
| Friday, 30 March 1663 | César Chávez Day (observance) | |
| 3 | Saturday, 31 March 1663 | César Chávez Day |
| 4 | Wednesday, 30 May 1663 | Memorial Day |
| 5 | Wednesday, 4 July 1663 | Independence Day |
| 6 | Monday, 3 September 1663 | Labor Day |
| 7 | Tuesday, 25 December 1663 | Christmas |