Honolulu, Maui, Kauaʻi, and the island of Hawaiʻi use Hawaii Standard Time, UTC−10, all year. To see the current hour and minute, select Hawaii on the official U.S. time site or add Honolulu to your phone’s world clock.

From Los Angeles, subtract 2 hours during Pacific Standard Time or 3 hours during Pacific Daylight Time. For example, noon in Los Angeles is 10 a.m. in Honolulu in standard time and 9 a.m. in daylight time. The mainland clocks change while Hawaii’s stay fixed.

From Dallas, subtract 4 hours in Central Standard Time or 5 in Central Daylight Time. From New York, subtract 5 hours in Eastern Standard Time or 6 in Eastern Daylight Time. A 9 a.m. New York call therefore starts at 4 a.m. or 3 a.m. in Hawaii, depending on the season.

An early mainland timestamp can belong to the previous date in Hawaii. At 1 a.m. Tuesday in New York during standard time, it’s 8 p.m. Monday in Honolulu. For flights and meetings, check the day as well as the hour and set the calendar event to the city’s time zone.