Public holidays
1851, USA, Illinois
| # | Date | Public holiday |
|---|---|---|
| 1 | Wednesday, January 1, 1851 | New Year's Day |
| 2 | Wednesday, February 12, 1851 | Lincoln's Birthday |
| 3 | Saturday, February 22, 1851 | Washington's Birthday |
| 4 | Friday, May 30, 1851 | Memorial Day |
| 5 | Friday, July 4, 1851 | Independence Day |
| 6 | Monday, September 1, 1851 | Labor Day |
| 7 | Tuesday, November 4, 1851 | Election Day |
| 8 | Thursday, December 25, 1851 | Christmas |