Bangladesh time zone history
Daylight saving time was used in 1 year since 1970, last in 2009; under the current rules the clocks no longer change. The record holds 6 different UTC offsets, the most of the 6 zones on UTC+6 standard time.
UTC+6
Standard time is UTC+6 all year under the current rules.
Summer time in 1 of 57 years since 1970
Before 1970
Standard time changes
| Date | Change | New standard time | Clock label |
|---|---|---|---|
| Before 1970 | |||
| January 1, 1890 | Local mean time (UTC+6:01:40) replaced | UTC+5:53:20 | HMT |
| October 1, 1941 | Standard time forward 37 minutes | UTC+6:30 | numeric only |
| May 15, 1942 | Standard time back 1 hour | UTC+5:30 | numeric only |
| September 1, 1942 | Standard time forward 1 hour | UTC+6:30 | numeric only |
| September 30, 1951 | Standard time back 30 minutes | UTC+6 | numeric only |
Daylight saving periods
| Years | Clocks go forward | Clocks go back | Shift and labels |
|---|---|---|---|
| 2009 | June 19 | not that year | 1 hour |
| 2010 | not that year | January 1 | 1 hour |
Also on UTC+6
Bhutan, Ürümqi (China), Kyrgyzstan, Omsk (Russia) and British Indian Ocean Territory.
Clocks next door since 1970
- India (248 km): usually 30 minutes behind; different on 195 days in 2009.
- Bhutan (424 km): same time except 6,677 days in 1970–1987 and 2009.
- Nepal (677 km): usually 15 minutes behind; different on 6,039 days in 1970–1985 and 2009.
- Myanmar (976 km): usually 30 minutes ahead; different on 195 days in 2009.
- Thailand (1,535 km): usually 1 hour ahead; different on 195 days in 2009.
How it compares
Dhaka left local mean time (UTC+6:01:40) in 1890, the earliest switch of the 6 zones on UTC+6 standard time.
Standard time has stayed at UTC+6 since 1951.
On standard time, clocks in Dhaka run 2 minutes behind local mean solar time.