Singapore Standard Time
During World War II, when the Japanese occupied Singapore, UTC+09:00 was used, to follow Japan time, while UTC+07:20 and UTC+07:30 were used for daylight saving time. When Peninsular Malaysia moved its standard time 30 minutes ahead from UTC+07:30 to UTC+08:00 on 31 December 1981, Singapore shifted too.
- Why is Singapore in the "Wrong" Time Zone?
- Singapore Standard Time Archived 2012-12-25 at Archive.today
- National Metrology Centre Archived 2013-12-16 at the Wayback Machine