What is HST in TRT?
Turkey Time is 13 hours ahead
Hawaii Standard Time is on UTC−10:00 and Turkey Time is on UTC+3:00 right now. That gap holds all year, because both zones change their clocks together.
- Time in Honolulu
- 4:56 pm
- Time in Istanbul
- 5:56 am
- Difference
- +13 h
- Next clock change
- Neither zone
Convert a time
TRT — Turkey Time
5:00 am
Wed, the next day
Daylight saving
Hawaii Standard Time
Hawaii Standard Time stays on HST all year, so its offset from UTC never moves.
Turkey Time
Turkey Time stays on TRT all year, so its offset from UTC never moves.
HST to TRT conversion table
Every hour of Tuesday, September 22, 2026, converted from Hawaii Standard Time to Turkey Time. 13 of the 24 hours fall on a different calendar day in Istanbul, which is marked.
- 12:00 am HST
- 1:00 pm TRT
- 1:00 am HST
- 2:00 pm TRT
- 2:00 am HST
- 3:00 pm TRT
- 3:00 am HST
- 4:00 pm TRT
- 4:00 am HST
- 5:00 pm TRT
- 5:00 am HST
- 6:00 pm TRT
- 6:00 am HST
- 7:00 pm TRT
- 7:00 am HST
- 8:00 pm TRT
- 8:00 am HST
- 9:00 pm TRT
- 9:00 am HST
- 10:00 pm TRT
- 10:00 am HST
- 11:00 pm TRT
- 11:00 am HST
- 12:00 am TRT+1 day
- 12:00 pm HST
- 1:00 am TRT+1 day
- 1:00 pm HST
- 2:00 am TRT+1 day
- 2:00 pm HST
- 3:00 am TRT+1 day
- 3:00 pm HST
- 4:00 am TRT+1 day
- 4:00 pm HST
- 5:00 am TRT+1 day
- 5:00 pm HST
- 6:00 am TRT+1 day
- 6:00 pm HST
- 7:00 am TRT+1 day
- 7:00 pm HST
- 8:00 am TRT+1 day
- 8:00 pm HST
- 9:00 am TRT+1 day
- 9:00 pm HST
- 10:00 am TRT+1 day
- 10:00 pm HST
- 11:00 am TRT+1 day
- 11:00 pm HST
- 12:00 pm TRT+1 day
Scheduling between the two
There is no overlap between a nine-to-six working day in Honolulu and one in Istanbul — the gap is too wide. A call has to sit early or late for one side. Early morning in Honolulu is the usual compromise, since that is late afternoon or evening in Istanbul.
Hawaii Standard Time (HST) is used in all of Hawaii, which does not observe daylight saving
Turkey Time (TRT) is used in all of Türkiye, on a permanent UTC+3 since 2016