Public holidays
1660, USA, Illinois
| # | Date | Public holiday |
|---|---|---|
| 1 | Thursday, 1 January 1660 | New Year's Day |
| 2 | Thursday, 12 February 1660 | Lincoln's Birthday |
| 3 | Sunday, 22 February 1660 | Washington's Birthday |
| 4 | Sunday, 30 May 1660 | Memorial Day |
| 5 | Sunday, 4 July 1660 | Independence Day |
| Monday, 5 July 1660 | Independence Day (observance) | |
| 6 | Monday, 6 September 1660 | Labor Day |
| 7 | Tuesday, 2 November 1660 | Election Day |
| Friday, 24 December 1660 | Christmas (observance)/Christmas Eve | |
| 8 | Saturday, 25 December 1660 | Christmas |
| Friday, 31 December 1660 | New Year's Day (observance) |