What time zone is Oʻahu in?
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Hawaiʻi-Aleutian Standard Time (HST), UTC-10. Hawaiʻi does not observe Daylight Saving Time — so the offset from the U.S. mainland shifts: 2 hours behind Pacific in winter, 3 hours behind in summer; 5 hours behind Eastern in winter, 6 hours behind in summer.
Topics: practical, logistics