UTC0930

UTC0930 is a compact designation for the time offset of nine hours and thirty minutes ahead of Coordinated Universal Time. In standard notation, the offset is written as UTC+09:30. The form UTC0930 appears in some computer systems, scheduling software, and timetables where a colon is not used to separate hours and minutes.

Geographic usage of this offset is most notably linked to Australian time zones. Australian Central Standard Time (ACST) uses UTC+09:30 and is observed in the Northern Territory year-round. In South Australia, the same offset is used during standard time, while daylight saving time advances the offset to UTC+10:30 (Australian Central Daylight Time, ACDT) in the summer months. The offset is thus distinctive in Australia and is not commonly used in most other regions.

Notational and practical considerations: UTC+09:30 is ahead of UTC by 9 hours and 30 minutes. In planning and scheduling, it is important to note whether daylight saving is in effect, as some areas switch to a different offset during part of the year. For example, when it is 00:00 UTC, it is 09:30 in UTC+09:30 zones, and 10:30 during daylight saving in areas that observe DST.

See also: time zone, Coordinated Universal Time, Australian Central Standard Time, daylight saving time.