Convert HST to GMT
Convert a time in HST to GMT, with daylight-saving changes applied for the date you choose.
HST to GMT
Time in HST, North America
Time in GMT, Europe
- HST now
- —
- GMT now
- —
Time zone details
HST, North America
- IANA zone
- Etc/GMT+10
- Standard offset
- UTC-10:00
- Daylight saving
- Not observed
GMT, Europe
- IANA zone
- UTC
- Standard offset
- UTC+00:00
- Daylight saving
- Not observed
Sunrise and sunset are calculated for the city centre and are accurate to about a minute. Local elevation and atmospheric conditions shift the observed horizon.
Need the reverse direction? Convert GMT to HST.
Related time zones conversions
Frequently asked questions
What is the time difference between HST and GMT?+
HST is UTC-10:00 and GMT is UTC+00:00 in standard time. The gap between them changes during the year if either place observes daylight saving, so enter a date to see the difference on that day.
Does HST observe daylight saving time?+
No. HST stays on UTC-10:00 all year.
Does GMT observe daylight saving time?+
No. GMT stays on UTC+00:00 all year.
Why does one local time sometimes have two answers?+
When clocks go back, the hour before the change repeats, so that local reading happens twice and both instants are valid. When clocks go forward, the skipped hour never occurs, so that reading has no matching instant at all. The converter reports both cases rather than guessing.