Public holidays
1620, USA, Illinois
| # | Date | Public holiday |
|---|---|---|
| 1 | Wednesday, January 1, 1620 | New Year's Day |
| 2 | Wednesday, February 12, 1620 | Lincoln's Birthday |
| 3 | Saturday, February 22, 1620 | Washington's Birthday |
| 4 | Saturday, May 30, 1620 | Memorial Day |
| Friday, July 3, 1620 | Independence Day (observance) | |
| 5 | Saturday, July 4, 1620 | Independence Day |
| 6 | Monday, September 7, 1620 | Labor Day |
| 7 | Tuesday, November 3, 1620 | Election Day |
| 8 | Friday, December 25, 1620 | Christmas |