LHST to GMT Converter

Standard business hours (9 AM–5 PM, Mon–Fri) in Lord Howe Time and Greenwich Mean Time don't overlap on the same weekday. Greenwich Mean Time is 9 hours behind Lord Howe Time.

With some flexibility, there’s a workable window outside standard hours:

• 5 PM–8 PM in Lord Howe Time (7 AM–10 AM in Greenwich Mean Time) — suggest 6:00 PM Lord Howe Time (8:30 AM Greenwich Mean Time).

This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.

Lord Howe Time is also known as LHST, or LHDT. To call Australia, dial +61.

Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.

Greenwich Mean Time is approximately 10,700 miles northwest of Lord Howe Time.

Both zones observe daylight saving time, but they transition on different dates.

Lord Howe Time: next transition on Sunday, October 4, 2026.

Greenwich Mean Time: next transition on Sunday, October 25, 2026.

Lord Howe Time and Greenwich Mean Time are in opposite hemispheres, so their clocks change in opposite directions about six months apart — one springs forward while the other falls back. The offset between them therefore shifts twice a year and can swing by up to two hours across the seasons, more than a typical same-hemisphere pair. Recurring meetings will need re-checking after each transition.

See the daylight saving time page for transition dates across every time zone.