HST to BST Converter
GMT is 10 hours ahead of HST. 9:00 AM HST = 7:00 PM GMT.
GMT is 10 hours ahead of HST at the moment. To convert HST to BST, add 10 hours to the HST time: 9:00 AM HST = 7:00 PM GMT.
HST (Hawaii-Aleutian Time) is used in Hawaii (all year, no daylight saving time). BST (British Time) is used in United Kingdom from late March to late October.
BST here means British Summer Time, not Bangladesh Standard Time. BST (British Summer Time) is not in force right now: United Kingdom from late March to late October is currently on GMT. This page uses whichever name applies on the date you pick, so the numbers below say GMT.
HST to BST time conversion table
HST to BST on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| HST | BST | Day |
|---|---|---|
| 12:00 AM HST | 10:00 AM GMT | — |
| 1:00 AM HST | 11:00 AM GMT | — |
| 2:00 AM HST | 12:00 PM GMT | — |
| 3:00 AM HST | 1:00 PM GMT | — |
| 4:00 AM HST | 2:00 PM GMT | — |
| 5:00 AM HST | 3:00 PM GMT | — |
| 6:00 AM HST | 4:00 PM GMT | — |
| 7:00 AM HST | 5:00 PM GMT | — |
| 8:00 AM HST | 6:00 PM GMT | — |
| 9:00 AM HST | 7:00 PM GMT | — |
| 10:00 AM HST | 8:00 PM GMT | — |
| 11:00 AM HST | 9:00 PM GMT | — |
| 12:00 PM HST | 10:00 PM GMT | night |
| 1:00 PM HST | 11:00 PM GMT | night |
| 2:00 PM HST | 12:00 AM GMT | next day |
| 3:00 PM HST | 1:00 AM GMT | next day |
| 4:00 PM HST | 2:00 AM GMT | next day |
| 5:00 PM HST | 3:00 AM GMT | next day |
| 6:00 PM HST | 4:00 AM GMT | next day |
| 7:00 PM HST | 5:00 AM GMT | next day |
| 8:00 PM HST | 6:00 AM GMT | next day |
| 9:00 PM HST | 7:00 AM GMT | next day |
| 10:00 PM HST | 8:00 AM GMT | next day |
| 11:00 PM HST | 9:00 AM GMT | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert HST to BST
Add 10 hours to the HST time to get BST.
Example: 9:00 AM HST = 7:00 PM GMT.
Across midnight: 10:00 PM HST = 8:00 AM GMT (next day). The date changes, so always check the day as well as the hour.
Time difference between HST and BST
The time difference between HST and BST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 31 Dec 2025 – 27 Mar 2026: BST is 10 hours ahead of HST.
- 28 Mar 2026 – 23 Oct 2026: BST is 11 hours ahead of HST.
- 24 Oct 2026 – 30 Dec 2026: BST is 10 hours ahead of HST.
HST and BST during daylight saving time
- HST does not observe daylight saving time; it stays on UTC−10 all year.
- BST next changes on 28 Mar 2027: clocks go forward one hour at 00:59 local time, from GMT (UTC+0) to BST (UTC+1).
Best time for a meeting between HST and BST
HST and BST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM HST, which is 5:00 PM GMT.
HST to BST FAQ
What is the time difference between HST and BST?
Right now GMT is 10 hours ahead of HST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM HST in BST?
9:00 AM HST is 7:00 PM GMT.
What is 12 PM (noon) HST in BST?
12:00 PM HST is 10:00 PM GMT.
Is BST ahead of or behind HST?
GMT is 10 hours ahead of HST, so it is later in BST than in HST.
Does HST change for daylight saving time?
No. HST stays on the same offset all year, so conversions never shift for daylight saving time.
Does BST change for daylight saving time?
Yes. BST next changes on 28 Mar 2027, when clocks go forward one hour from GMT to BST.
What is the best time for a meeting between HST and BST?
HST and BST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM HST, which is 5:00 PM GMT.
Related conversions
Convert BST to HST
Convert HST to other time zones
Convert other time zones to BST
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.