What is TRT in HST?
Hawaii Standard Time is 13 hours behind
Turkey Time is on UTC+3:00 and Hawaii Standard Time is on UTC−10:00 right now. That gap holds all year, because both zones change their clocks together.
- Time in Istanbul
- 5:14 am
- Time in Honolulu
- 4:14 pm
- Difference
- −13 h
- Next clock change
- Neither zone
Convert a time
HST — Hawaii Standard Time
4:00 pm
Tue, the previous day
Daylight saving
Turkey Time
Turkey Time stays on TRT all year, so its offset from UTC never moves.
Hawaii Standard Time
Hawaii Standard Time stays on HST all year, so its offset from UTC never moves.
TRT to HST conversion table
Every hour of Wednesday, September 23, 2026, converted from Turkey Time to Hawaii Standard Time. 13 of the 24 hours fall on a different calendar day in Honolulu, which is marked.
- 12:00 am TRT
- 11:00 am HST−1 day
- 1:00 am TRT
- 12:00 pm HST−1 day
- 2:00 am TRT
- 1:00 pm HST−1 day
- 3:00 am TRT
- 2:00 pm HST−1 day
- 4:00 am TRT
- 3:00 pm HST−1 day
- 5:00 am TRT
- 4:00 pm HST−1 day
- 6:00 am TRT
- 5:00 pm HST−1 day
- 7:00 am TRT
- 6:00 pm HST−1 day
- 8:00 am TRT
- 7:00 pm HST−1 day
- 9:00 am TRT
- 8:00 pm HST−1 day
- 10:00 am TRT
- 9:00 pm HST−1 day
- 11:00 am TRT
- 10:00 pm HST−1 day
- 12:00 pm TRT
- 11:00 pm HST−1 day
- 1:00 pm TRT
- 12:00 am HST
- 2:00 pm TRT
- 1:00 am HST
- 3:00 pm TRT
- 2:00 am HST
- 4:00 pm TRT
- 3:00 am HST
- 5:00 pm TRT
- 4:00 am HST
- 6:00 pm TRT
- 5:00 am HST
- 7:00 pm TRT
- 6:00 am HST
- 8:00 pm TRT
- 7:00 am HST
- 9:00 pm TRT
- 8:00 am HST
- 10:00 pm TRT
- 9:00 am HST
- 11:00 pm TRT
- 10:00 am HST
Scheduling between the two
There is no overlap between a nine-to-six working day in Istanbul and one in Honolulu — the gap is too wide. A call has to sit early or late for one side. Early morning in Istanbul is the usual compromise, since that is late afternoon or evening in Honolulu.
Turkey Time (TRT) is used in all of Türkiye, on a permanent UTC+3 since 2016
Hawaii Standard Time (HST) is used in all of Hawaii, which does not observe daylight saving