Time in Mount Gambier, Australia

Time zone: ACST (UTC/GMT +09:30) — Australia/Adelaide

The local standard in Mount Gambier is ACST — UTC+09:30, or 9 hours 30 minutes ahead of UTC. Systems that store time zones by name use Australia/Adelaide for this part of the world.

This zone does shift. On Sunday, 04 October 2026 the clocks go forward 1 hour and Mount Gambier moves to ACDT, so anything booked across that date needs checking.

Bear in mind Australia spans 7 zones across the 50 cities we cover — checking a second city in the same country is often necessary.

How Mount Gambier lines up against other major centres at this moment — the numbers move when either side changes its clocks.

Overlap of a normal working day, shown in Mount Gambier time — outside these windows one side is off the clock.

No shared working window exists with New York, Los Angeles, London or Sao Paulo, so those calls have to sit outside somebody's normal hours.

No difference at all from Mount Gambier: the cities below share the Australia/Adelaide zone.

Adelaide Whyalla