Australia observes Daylight Saving Time in the Southern Hemisphere summer — clocks spring forward in October and fall back in April. In 2026, DST starts October 4 and ends April 5, 2026 (beginning of the 2025–2026 DST period).
New South Wales (NSW), Victoria (VIC), Australian Capital Territory (ACT), Tasmania (TAS), and South Australia (SA) observe Daylight Saving Time. Queensland (QLD), Western Australia (WA), and the Northern Territory (NT) do not observe DST and remain on standard time year-round.
During DST: AEDT (Australian Eastern Daylight Time) = UTC+11 — NSW, VIC, ACT, TAS. ACDT (Australian Central Daylight Time) = UTC+10:30 — South Australia. Queensland uses AEST (UTC+10) year-round. WA uses AWST (UTC+8) year-round.
South Australia transitions on the third Sunday in October (not the first), so it starts DST one week after NSW, VIC, ACT, and TAS. This means there is a brief window each October where South Australia is at a different offset from its eastern neighbours.
During Australian DST (October–April), Sydney (AEDT, UTC+11) is 16 hours ahead of New York (EST) and 11 hours ahead of London (GMT). When Australia is in summer time and the Northern Hemisphere is in winter standard time, the time gaps are at their widest.