Public holidays
1820, USA, Iowa
| # | Date | Public holiday |
|---|---|---|
| 1 | Saturday, 1 January 1820 | New Year's Day |
| Friday, 11 February 1820 | Lincoln's Birthday (observance) | |
| 2 | Saturday, 12 February 1820 | Lincoln's Birthday |
| 3 | Tuesday, 30 May 1820 | Memorial Day |
| 4 | Tuesday, 4 July 1820 | Independence Day |
| 5 | Monday, 4 September 1820 | Labor Day |
| 6 | Monday, 25 December 1820 | Christmas |