Offset
The time difference between Chattogram and Greenwich Mean Time is 5 hours.
Chattogram (BST) is ahead of Greenwich Mean Time (BST).
BST: UTC+6
BST: UTC+1
Greenwich Mean Time is currently observing daylight saving time; Chattogram is not.
When to schedule
Business-hours overlap: 2 PM–5 PM in Chattogram (9 AM–12 PM in Greenwich Mean Time).
Both teams are in working hours during this window on weekdays.
Suggested time: 3:00 PM Chattogram (10:00 AM Greenwich Mean Time).
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Bangladesh
- International Mother Language DaySat, Feb 21
- Independence and National DayThu, Mar 26
- Bengali New YearTue, Apr 14
- Labour DayFri, May 1
- July Mass Uprising DayWed, Aug 5
- Victory DayWed, Dec 16
- Christmas DayFri, Dec 25
United Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
About these zones
Chattogram uses Bangladesh Standard Time (BST). To call Bangladesh, dial +880.
Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.
Greenwich Mean Time is approximately 5,100 miles northwest of Chattogram.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Chattogram | GMT | Day |
|---|---|---|
| 12:00 am | 7:00 pm | -1 day |
| 1:00 am | 8:00 pm | -1 day |
| 2:00 am | 9:00 pm | -1 day |
| 3:00 am | 10:00 pm | -1 day |
| 4:00 am | 11:00 pm | -1 day |
| 5:00 am | 12:00 am | Same day |
| 6:00 am | 1:00 am | Same day |
| 7:00 am | 2:00 am | Same day |
| 8:00 am | 3:00 am | Same day |
| 9:00 am | 4:00 am | Same day |
| 10:00 am | 5:00 am | Same day |
| 11:00 am | 6:00 am | Same day |
| 12:00 pm | 7:00 am | Same day |
| 1:00 pm | 8:00 am | Same day |
| 2:00 pm | 9:00 am | Same day |
| 3:00 pm | 10:00 am | Same day |
| 4:00 pm | 11:00 am | Same day |
| 5:00 pm | 12:00 pm | Same day |
| 6:00 pm | 1:00 pm | Same day |
| 7:00 pm | 2:00 pm | Same day |
| 8:00 pm | 3:00 pm | Same day |
| 9:00 pm | 4:00 pm | Same day |
| 10:00 pm | 5:00 pm | Same day |
| 11:00 pm | 6:00 pm | Same day |
Daylight saving time
Greenwich Mean Time observes daylight saving time; Chattogram does not. The offset between the two zones changes when Greenwich Mean Time transitions: on Sunday, October 25, 2026, clocks fall back from BST to GMT.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:21 AM
- Sunset
- 6:38 PM
- Day length
- 13h 17m
- Sunrise
- 5:10 AM
- Sunset
- 9:05 PM
- Day length
- 15h 55m
Cities in these zones
Cities in Greenwich Mean Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Bangladesh Standard Time
- DAC
- CGP
- JSR
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Related conversions
Common conversions
- What is 9:00 am Chattogram in GMT?
- 9:00 am Chattogram is 4:00 am GMT.
- What is 12:00 pm Chattogram in GMT?
- 12:00 pm Chattogram is 7:00 am GMT.
- What is 12:30 pm Chattogram in GMT?
- 12:30 pm Chattogram is 7:30 am GMT.
- What is 2:00 pm Chattogram in GMT?
- 2:00 pm Chattogram is 9:00 am GMT.
- What is 5:00 pm Chattogram in GMT?
- 5:00 pm Chattogram is 12:00 pm GMT.
- What is 11:30 pm Chattogram in GMT?
- 11:30 pm Chattogram is 6:30 pm GMT.