Sri Lanka time zone history
Its standard time, UTC+5:30, is one of only 14 offsets among the 312 zones that are not a whole number of hours from UTC. On standard time, clocks in Colombo run 11 minutes ahead of local mean solar time.
UTC+5:30
Standard time is UTC+5:30 all year under the current rules.
3 times a new standard time since 1970
Before 1970
Standard time changes
| Date | Change | New standard time | Clock label |
|---|---|---|---|
| Before 1970 | |||
| January 1, 1880 | Local mean time (UTC+5:19:24) replaced | UTC+5:19:32 | MMT |
| January 1, 1906 | Standard time forward 10 minutes | UTC+5:30 | numeric only |
| Since 1970 | |||
| May 25, 1996 | Standard time forward 1 hour | UTC+6:30 | numeric only |
| October 26, 1996 | Standard time back 30 minutes | UTC+6 | numeric only |
| April 15, 2006 | Standard time back 30 minutes | UTC+5:30 | numeric only |
Daylight saving periods
| Years | Clocks go forward | Clocks go back | Shift and labels |
|---|---|---|---|
| 1942 | January 5, September 1 | not that year | 30 minutes |
| 1945 | not that year | October 16 | 1 hour |
Also on UTC+5:30
Clocks next door since 1970
- Maldives (767 km): usually 30 minutes behind; different on 3,612 days in 1996–2006.
- British Indian Ocean Territory (1,788 km): usually 30 minutes behind; different on 11,169 days in 1995–2026; 30 minutes ahead today.
- India (1,960 km): same time except 3,612 days in 1996–2006.
- Myanmar (2,084 km): usually 1 hour ahead; different on 3,612 days in 1996–2006.
- Bangladesh (2,181 km): usually 30 minutes ahead; different on 3,807 days in 1996–2006 and 2009.