Solomon Islands time zone history
On standard time, clocks in Guadalcanal run 19 minutes ahead of local mean solar time. Local mean time, UTC+10:39:48, ended in 1912.
UTC+11
Standard time is UTC+11 all year under the current rules.
UTC+11 every day since 1970
Before 1970
Standard time changes
| Date | Change | New standard time | Clock label |
|---|---|---|---|
| Before 1970 | |||
| October 1, 1912 | Local mean time (UTC+10:39:48) replaced | UTC+11 | numeric only |
Also on UTC+11
Bougainville (Papua New Guinea), Vanuatu, New Caledonia, Micronesia, Norfolk Island, Sakhalin (Russia), Magadan (Russia) and Srednekolymsk (Russia).
Clocks next door since 1970
- Bougainville (Papua New Guinea) (630 km): usually 1 hour behind; different on 4,387 days in 2014–2026; same time today.
- Nauru (1,248 km): usually 1 hour ahead; different on 3,327 days in 1970–1979.
- Vanuatu (1,267 km): same time except 1,757 days in 1973, 1974 and 1983–1993.
- Port Moresby (Papua New Guinea) (1,429 km): always 1 hour behind.
- New Caledonia (1,565 km): same time except 262 days in 1977–1979, 1996 and 1997.
How it compares
The Solomon Islands has kept UTC+11 since 1912, with no clock changes since 1970.