Public holidays
1511, USA, Illinois
| # | Date | Public holiday |
|---|---|---|
| 1 | Sunday, 1 January 1511 | New Year's Day |
| Monday, 2 January 1511 | New Year's Day (observance) | |
| 2 | Monday, 16 January 1511 | Martin Luther King Day |
| 3 | Sunday, 12 February 1511 | Lincoln's Birthday |
| Monday, 13 February 1511 | Lincoln's Birthday (observance) | |
| 4 | Monday, 20 February 1511 | Washington's Birthday |
| 5 | Monday, 29 May 1511 | Memorial Day |
| 6 | Monday, 19 June 1511 | Juneteenth National Independence Day |
| 7 | Tuesday, 4 July 1511 | Independence Day |
| 8 | Monday, 4 September 1511 | Labor Day |
| 9 | Monday, 9 October 1511 | Columbus Day |
| 10 | Tuesday, 7 November 1511 | Election Day |
| Friday, 10 November 1511 | Veterans Day (observance) | |
| 11 | Saturday, 11 November 1511 | Veterans Day |
| 12 | Thursday, 23 November 1511 | Thanksgiving |
| 13 | Monday, 25 December 1511 | Christmas |