Public holidays
1866, USA, Hawaii
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, 1 January 1866 | New Year's Day |
| 2 | Thursday, 22 February 1866 | Washington's Birthday |
| 3 | Monday, 26 March 1866 | Seward's Day/Prince Jonah Kuhio Kalanianaole Day |
| Friday, 30 March 1866 | César Chávez Day (observance)/Good Friday | |
| 4 | Wednesday, 30 May 1866 | Memorial Day |
| 5 | Monday, 11 June 1866 | King Kamehameha I Day |
| 6 | Wednesday, 4 July 1866 | Independence Day |
| 7 | Friday, 17 August 1866 | Statehood Day |
| 8 | Monday, 3 September 1866 | Labor Day |
| 9 | Tuesday, 6 November 1866 | Election Day |
| 10 | Thursday, 29 November 1866 | Thanksgiving |
| 11 | Tuesday, 25 December 1866 | Christmas |