ICT to BST Time Converter
BST is 6 hours behind ICT. ICT is UTC+7:00, and BST is UTC+1:00.
Best Time to Call Between ICT and BST
Both zones are inside normal business hours between 3:00 PM and 5:00 PM ICT — that's 9:00 AM to 11:00 AM BST. That's a 2-hour window.
both at work ICT only BST only neither — hours along the strip are ICT.
Common Times Converted
ICT on the left, BST on the right.
ICT to BST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| ICT | BST | Working hours |
|---|---|---|
| 12:00 AM | 6:00 PM prev day | — |
| 1:00 AM | 7:00 PM prev day | — |
| 2:00 AM | 8:00 PM prev day | — |
| 3:00 AM | 9:00 PM prev day | — |
| 4:00 AM | 10:00 PM prev day | — |
| 5:00 AM | 11:00 PM prev day | — |
| 6:00 AM | 12:00 AM | — |
| 7:00 AM | 1:00 AM | — |
| 8:00 AM | 2:00 AM | — |
| 9:00 AM | 3:00 AM | ICT only |
| 10:00 AM | 4:00 AM | ICT only |
| 11:00 AM | 5:00 AM | ICT only |
| 12:00 PM | 6:00 AM | ICT only |
| 1:00 PM | 7:00 AM | ICT only |
| 2:00 PM | 8:00 AM | ICT only |
| 3:00 PM | 9:00 AM | Both zones |
| 4:00 PM | 10:00 AM | Both zones |
| 5:00 PM | 11:00 AM | BST only |
| 6:00 PM | 12:00 PM | BST only |
| 7:00 PM | 1:00 PM | BST only |
| 8:00 PM | 2:00 PM | BST only |
| 9:00 PM | 3:00 PM | BST only |
| 10:00 PM | 4:00 PM | BST only |
| 11:00 PM | 5:00 PM | — |
What ICT and BST Actually Are
ICT — Indochina Time
Bangkok, Ho Chi Minh City, Hanoi, Phnom Penh, Vientiane. Standing at UTC+7:00 as written, and the region does not change its clocks, so that offset holds all year.
Indochina Time is shared across four countries, which makes South-East Asian scheduling unusually simple compared with Europe or the Americas.
BST — British Summer Time
London, Manchester, Birmingham, Glasgow, and the rest of the UK from late March to late October. Standing at UTC+1:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, October 25, 2026, to GMT. BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.
British Summer Time began in 1916 as a wartime fuel-saving measure and has run every year since, making it one of the oldest continuous daylight saving schemes in the world.
What This Means in Practice
This gap is not fixed
BST changes its clocks and ICT does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, October 25, 2026 unless someone resets it.
Major Cities in Each Zone
Cities on ICT
Cities on BST
Frequently Asked Questions
What is the time difference between ICT and BST?
BST is 6 hours behind ICT.
What is 9:00 AM ICT in BST?
9:00 AM ICT is 3:00 AM BST.
What are the best hours to schedule a call between ICT and BST?
Between 3:00 PM and 5:00 PM ICT, which is 9:00 AM to 11:00 AM BST. Both sides are inside normal business hours through that window.
Does the difference between ICT and BST change during the year?
Yes. BST observes daylight saving and ICT does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, October 25, 2026.
Does BST always mean British Summer Time?
BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.