[2] Before 1896, Hawaii did not use a standard time zone.
On January 8, 1896, the minister of the interior of the Provisional Government of Hawaii created a standard time zone, Hawaiian Standard Time, which was set at UTC−10:30.
Hawaii began observing Hawaiian Standard Time on January 13, 1896, at noon.
[3][4] On May 19, 1947, the Hawaii Territorial Legislature approved a bill to change Hawaiian Standard Time to UTC−10:00, which would go into effect on June 8, 1947.
On March 30, 1967, the Hawaii State Legislature chose to exempt the state from using daylight saving time.