Public holidays
1644, USA, Hawaii
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1644 | New Year's Day |
| 2 | Monday, 22 February 1644 | Washington's Birthday |
| Friday, 25 March 1644 | Good Friday/Prince Jonah Kuhio Kalanianaole Day (observance) | |
| 3 | Saturday, 26 March 1644 | Prince Jonah Kuhio Kalanianaole Day |
| 4 | Monday, 30 May 1644 | Memorial Day |
| Friday, 10 June 1644 | King Kamehameha I Day (observance) | |
| 5 | Saturday, 11 June 1644 | King Kamehameha I Day |
| 6 | Monday, 4 July 1644 | Independence Day |
| 7 | Friday, 19 August 1644 | Statehood Day |
| 8 | Monday, 5 September 1644 | Labor Day |
| 9 | Tuesday, 8 November 1644 | Election Day |
| 10 | Sunday, 25 December 1644 | Christmas |
| Monday, 26 December 1644 | Christmas (observance) |