Public holidays
1820, USA, Hawaii
| # | Date | Public holiday |
|---|---|---|
| 1 | Saturday, 1 January 1820 | New Year's Day |
| 2 | Tuesday, 22 February 1820 | Washington's Birthday |
| 3 | Sunday, 26 March 1820 | Prince Jonah Kuhio Kalanianaole Day |
| Monday, 27 March 1820 | Seward's Day/Prince Jonah Kuhio Kalanianaole Day (observance) | |
| 4 | Friday, 31 March 1820 | César Chávez Day/Good Friday |
| 5 | Tuesday, 30 May 1820 | Memorial Day |
| 6 | Sunday, 11 June 1820 | King Kamehameha I Day |
| Monday, 12 June 1820 | King Kamehameha I Day (observance) | |
| 7 | Tuesday, 4 July 1820 | Independence Day |
| 8 | Friday, 18 August 1820 | Statehood Day |
| 9 | Monday, 4 September 1820 | Labor Day |
| 10 | Tuesday, 7 November 1820 | Election Day |
| 11 | Monday, 25 December 1820 | Christmas |