Current Time in IANA Australia/LHI Timezone
IANA Name: Australia/LHI
Standard Offset: UTC +10:30
Daylight Saving: Yes
DST Offset: UTC +11:00
DST Abbreviation: GMT+11
Currently Observing DST: No ❌
Australia/LHI: Lord Howe Island Time Zone
Australia/LHI is the IANA time zone identifier for Lord Howe Island, a small island territory of New South Wales, Australia, located in the Tasman Sea. This zone uses a unique offset of UTC+10:30 during standard time and UTC+11:00 during daylight saving time, making it one of only two time zones in the world with a half-hour offset (the other being Australia/Adelaide and Australia/Broken_Hill). The zone applies exclusively to Lord Howe Island and its surrounding islets, covering a population of about 380 residents and a land area of 14.6 square kilometers.
Geographic Scope and Usage
The Australia/LHI zone is used only on Lord Howe Island, a UNESCO World Heritage site known for its unique biodiversity and pristine environment. The island operates on its own time, distinct from the rest of New South Wales (which uses Australia/Sydney, UTC+10:00/+11:00). This means that during standard time, Lord Howe Island is 30 minutes ahead of Sydney, and during daylight saving time, it is 30 minutes behind Sydney (since Sydney moves to UTC+11:00). The zone is also 30 minutes behind Australia/Adelaide and Australia/Broken_Hill during standard time, but aligns with them during DST (all three use UTC+11:00).
Offset and Abbreviation
Standard time offset: UTC+10:30. During daylight saving time, clocks are set forward by 30 minutes to UTC+11:00. The time zone abbreviation is LHST (Lord Howe Standard Time) for UTC+10:30 and LHDT (Lord Howe Daylight Time) for UTC+11:00. These abbreviations are specific to Lord Howe Island and are not used elsewhere. The half-hour offset is a historical quirk, likely adopted to better align the island's solar noon with its local time, given its longitude of 159°04'E (which would naturally be closer to UTC+10:36).
Daylight Saving Behavior
Lord Howe Island observes daylight saving time, but with a unique twist: the shift is only 30 minutes, not the usual one hour. DST begins on the first Sunday in October at 02:00 LHST, when clocks move forward to 02:30 LHDT. DST ends on the first Sunday in April at 02:00 LHDT, when clocks move back to 01:30 LHST. This half-hour adjustment means that during summer, the island is 30 minutes ahead of its standard time, but still 30 minutes behind Sydney (which moves from UTC+10:00 to UTC+11:00). The upcoming DST change dates are: 2025-04-06 (end, back to +1030), 2025-10-05 (start, to +11), 2026-04-05 (end), 2026-10-04 (start).
Main Countries and Cities
The only populated place in this zone is Lord Howe Island itself, with its main settlement being Lord Howe Island (also known as the Lord Howe Island Settlement). There are no other countries or major cities in this zone. The island is part of Australia but operates independently in timekeeping. For practical purposes, anyone referring to Australia/LHI is dealing exclusively with this tiny island.
Business Hours and Call Scheduling
Given its small population, business hours on Lord Howe Island are limited. Most businesses operate from around 08:00 to 17:00 LHST/LHDT. To schedule calls with mainland Australia: during standard time (April to October), Lord Howe Island is 30 minutes ahead of Sydney (UTC+10:00), so if it's 09:00 in Sydney, it's 09:30 on Lord Howe. During DST (October to April), Sydney moves to UTC+11:00, aligning with Lord Howe's DST offset, so they are on the same time. For calls to Adelaide (UTC+10:30/+11:00), during standard time both are UTC+10:30, so they match; during DST both are UTC+11:00, so they match. For calls to New Zealand (UTC+12:00/+13:00), Lord Howe is 1.5 to 2 hours behind. For calls to Asia (e.g., Tokyo UTC+9:00), Lord Howe is 1.5 to 2 hours ahead. The half-hour offset can cause confusion, so always double-check the current DST status.
Frequently Asked Questions
What does LHST stand for?
LHST stands for Lord Howe Standard Time, which is UTC+10:30. It is used on Lord Howe Island during the non-daylight saving period (early April to early October).
Why does Lord Howe Island have a half-hour time zone?
The half-hour offset (UTC+10:30) is due to the island's longitude of 159°04'E, which places its solar noon at about 10:36 UTC. Adopting UTC+10:30 keeps local time closer to solar time. The 30-minute DST shift is a unique compromise to align partially with mainland Australia during summer.
Is Lord Howe Island on the same time as Sydney?
Not always. During standard time (April to October), Lord Howe is 30 minutes ahead of Sydney (UTC+10:00). During daylight saving time (October to April), both use UTC+11:00, so they are on the same time.
When does daylight saving time start and end on Lord Howe Island?
Daylight saving time starts on the first Sunday in October at 02:00 LHST, when clocks move forward to 02:30 LHDT. It ends on the first Sunday in April at 02:00 LHDT, when clocks move back to 01:30 LHST. For example, in 2025, DST ends on April 6 and starts on October 5.
What is the time difference between Lord Howe Island and Adelaide?
Both use UTC+10:30 during standard time, so they are the same. During DST, both use UTC+11:00, so they remain the same. There is no time difference between Lord Howe Island and Adelaide at any time of year.
How do I schedule a call from the US to Lord Howe Island?
Lord Howe Island is 14.5 to 15.5 hours ahead of Eastern Standard Time (EST, UTC-5) depending on DST. For example, when it's 12:00 PM EST in winter, it's 02:30 AM LHST the next day. Use a world clock to convert, noting the half-hour offset. Best times are early morning EST (e.g., 8:00 AM EST = 10:30 PM LHST) or late evening EST (e.g., 9:00 PM EST = 11:30 AM LHST next day).