Public holidays
1840, USA, Illinois
| # | Date | Public holiday |
|---|---|---|
| 1 | Wednesday, 1 January 1840 | New Year's Day |
| 2 | Wednesday, 12 February 1840 | Lincoln's Birthday |
| 3 | Saturday, 22 February 1840 | Washington's Birthday |
| 4 | Saturday, 30 May 1840 | Memorial Day |
| Friday, 3 July 1840 | Independence Day (observance) | |
| 5 | Saturday, 4 July 1840 | Independence Day |
| 6 | Monday, 7 September 1840 | Labor Day |
| 7 | Tuesday, 3 November 1840 | Election Day |
| 8 | Friday, 25 December 1840 | Christmas |