Time zone · Oceania
LHST
Lord Howe Standard Time
Lord Howe Standard Time (LHST) covers the unique time used on Australia’s remote Lord Howe Island, which follows a rare UTC+10:30 offset and observes a distinctive 30-minute daylight saving shift—making it the only place on Earth that springs forward by just half an hour when clocks change.
Friday, October 16, 2026
Current offset
UTC+11:00
Daylight · +11
Daylight saving
Active
Reverts 4 Apr 2027
IANA zones
1
1 observe DST, 0 don't
DST offset
UTC+11:00
LHDT · +1h
About LHST
Standard time, with a summer shift.
Lord Howe Standard Time (LHST) covers the unique time used on Australia’s remote Lord Howe Island, which follows a rare UTC+10:30 offset and observes a distinctive 30-minute daylight saving shift—making it the only place on Earth that springs forward by just half an hour when clocks change.
DST schedule · LHST · LHDT
2027 Sunday · clocks fall back
Clocks fall back by one hour · in 6 months.
One year, two clocks
IANA zones · the technical identifiers
The zone that resolve to LHST.
For software, always store the IANA identifier — never the abbreviation alone. The database keeps these zones distinct because their rules can, and historically did, diverge.
Where LHST is used
One country.
Same offset · UTC+11:00
Other zones at UTC+11:00 right now.
These named zones share LHST's offset today. When daylight saving rules differ, they drift apart for part of the year.
Convert
LHST to the world's clocks.
Frequently asked questions
Common questions about LHST, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].
- Why does Lord Howe Island use a 30-minute daylight saving shift instead of the usual hour?
- The half-hour shift takes the island from UTC+10:30 to UTC+11:00, the same time Sydney keeps during daylight saving, so Lord Howe and Sydney share one clock time all summer.
- Is Lord Howe Standard Time used anywhere else besides Lord Howe Island?
- No, LHST is exclusive to Lord Howe Island; no other inhabited location in the world shares this specific timezone.
- How does the half-hour offset affect international scheduling with Lord Howe?
- The +10:30 standard offset (and +11:00 during DST) creates unusual meeting windows—often requiring extra care when syncing with nearby time zones like Sydney or Auckland.
- When do clocks on Lord Howe Island go into daylight saving time?
- Clocks spring forward by 30 minutes at 2:00 AM LHST, from 2:00 to 2:30 AM, on the first Sunday in October each year.
- What happens when daylight saving ends on Lord Howe Island?
- At 2:00 AM LHDT (UTC+11:00) on the first Sunday in April, clocks go back 30 minutes to 1:30 AM, returning to UTC+10:30, so the half hour from 1:30 to 2:00 AM happens twice.
- Why was a 30-minute time zone chosen originally?
- Lord Howe used Australian Eastern Standard Time (UTC+10:00) from 1895 until March 1981, when it moved to UTC+10:30, closer to local solar time for an island about 600 km east of the mainland.
- Does Lord Howe Island always observe DST?
- Yes. Lord Howe has observed daylight saving every year since October 1981. Until 1985 it moved a full hour, to UTC+11:30; since October 1985 it has moved 30 minutes, to UTC+11:00.
- How do digital calendars handle the 30-minute jumps?
- Most modern apps now support fractional offsets, though older systems sometimes miss the shift or mislabel events during the repeated half hour when daylight saving ends in April.
Source: IANA tzdb2026e · Reviewed
Free · Developer API
This time zone, as JSON.
Its defining offset, DST status and member counts, from one endpoint.
Also in the API: time zones by coordinates, conversions that flag daylight saving gaps, and abbreviations decoded.
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