GST: Gulf Standard Time
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GST to HST: convert Gulf Standard Time to Hawaii Standard Time
HST is 14 hours behind GST all year.
Neither clock changes for daylight saving, so the gap never moves.
GST also abbreviates South Georgia Time (UTC-2). These pages use the Gulf meaning.
One instant, two local clocks
Drag one day across both zones
Shared instant12:00 UTC
Difference nowHST is 14 hours behind
GSTGulf Standard Time
16:00Thu, Jan 15
HSTHawaii Standard Time
02:00Thu, Jan 15
Approximate daylight 09:00 to 17:00 Selected local time
Both lanes show the same instant. Local dates, daylight, and offsets come from each IANA zone on the selected date, so daylight saving changes are included.
Right now
HST: Hawaii Standard Time
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Local times come from your browser's IANA time zone data.
GST to HST hour by hour
| GST | HST |
|---|---|
| 12:00 AM | 10:00 AM (prev day) |
| 1:00 AM | 11:00 AM (prev day) |
| 2:00 AM | 12:00 PM (prev day) |
| 3:00 AM | 1:00 PM (prev day) |
| 4:00 AM | 2:00 PM (prev day) |
| 5:00 AM | 3:00 PM (prev day) |
| 6:00 AM | 4:00 PM (prev day) |
| 7:00 AM | 5:00 PM (prev day) |
| 8:00 AM | 6:00 PM (prev day) |
| 9:00 AM | 7:00 PM (prev day) |
| 10:00 AM | 8:00 PM (prev day) |
| 11:00 AM | 9:00 PM (prev day) |
| 12:00 PM | 10:00 PM (prev day) |
| 1:00 PM | 11:00 PM (prev day) |
| 2:00 PM | 12:00 AM |
| 3:00 PM | 1:00 AM |
| 4:00 PM | 2:00 AM |
| 5:00 PM | 3:00 AM |
| 6:00 PM | 4:00 AM |
| 7:00 PM | 5:00 AM |
| 8:00 PM | 6:00 AM |
| 9:00 PM | 7:00 AM |
| 10:00 PM | 8:00 AM |
| 11:00 PM | 9:00 AM |
Scheduling a call between GST and HST
Standard business hours (9:00 AM to 5:00 PM) do not overlap: daytime in Gulf Standard Time falls outside the working day in Hawaii Standard Time, so one side needs an early morning or late evening.
More GST conversions
Offsets are computed from the IANA time zone database for January 15 and July 15 of the current year. GST here means Gulf Standard Time (United Arab Emirates and Oman); HST means Hawaii Standard Time (Hawaii, United States).