What is BST in HST?

Hawaii Standard Time is 10 hours behind

British Time is on UTC+0:00 and Hawaii Standard Time is on UTC−10:00 right now. The gap changes during the year — see below.

Convert a time

GMT — British Time

HST — Hawaii Standard Time

10:00 pm

HST, Fri, the previous day

Time in London: 8:29:43 AM
Time in Honolulu: 10:29:43 PM
Difference: −10 h
Next clock change: March 28, 2027

When the difference changes

British Time and Hawaii Standard Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:

Now – March 28, 2027Hawaii Standard Time is 10 hours behind
March 28, 2027 – October 31, 2027Hawaii Standard Time is 11 hours behind
October 31, 2027 – onwardsHawaii Standard Time is 10 hours behind

Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.

Daylight saving

British Time

Sunday, March 28, 2027

Clocks go forward one hour — 1:00 am becomes 2:00 am local time, and the zone is on BST after that.

Hawaii Standard Time

No clock changes

Hawaii Standard Time stays on HST all year, so its offset from UTC never moves.

BST to HST conversion table

Every hour of Saturday, November 7, 2026, converted from British Time to Hawaii Standard Time. 10 of the 24 hours fall on a different calendar day in Honolulu, which is marked.

12:00 am GMT: 2:00 pm HST−1 day
1:00 am GMT: 3:00 pm HST−1 day
2:00 am GMT: 4:00 pm HST−1 day
3:00 am GMT: 5:00 pm HST−1 day
4:00 am GMT: 6:00 pm HST−1 day
5:00 am GMT: 7:00 pm HST−1 day
6:00 am GMT: 8:00 pm HST−1 day
7:00 am GMT: 9:00 pm HST−1 day
8:00 am GMT: 10:00 pm HST−1 day
9:00 am GMT: 11:00 pm HST−1 day
10:00 am GMT: 12:00 am HST
11:00 am GMT: 1:00 am HST

12:00 pm GMT: 2:00 am HST
1:00 pm GMT: 3:00 am HST
2:00 pm GMT: 4:00 am HST
3:00 pm GMT: 5:00 am HST
4:00 pm GMT: 6:00 am HST
5:00 pm GMT: 7:00 am HST
6:00 pm GMT: 8:00 am HST
7:00 pm GMT: 9:00 am HST
8:00 pm GMT: 10:00 am HST
9:00 pm GMT: 11:00 am HST
10:00 pm GMT: 12:00 pm HST
11:00 pm GMT: 1:00 pm HST

Scheduling between the two

There is no overlap between a nine-to-six working day in London and one in Honolulu — the gap is too wide. A call has to sit early or late for one side. Early morning in London is the usual compromise, since that is late afternoon or evening in Honolulu.

A note on BST: it can also mean Bangladesh Standard Time (UTC+6). This page means British Summer Time.

British Time (GMT) is used in the whole United Kingdom. In winter the UK is on GMT; from late March to late October it is on BST, an hour ahead.

Hawaii Standard Time (HST) is used in all of Hawaii, which does not observe daylight saving