How Does Daylight Saving Time Affect AEST?
AEST (UTC+10) is used during Australian winter (April-October). In summer, some states switch to AEDT (UTC+11).Which States Switch?
| State | Winter | Summer |
|---|---|---|
| NSW, VIC, TAS, ACT | AEST (UTC+10) | AEDT (UTC+11) |
| Queensland | AEST (UTC+10) | AEST (UTC+10) — no DST |
During Australian summer, Sydney and Brisbane are 1 hour apart.
Australian DST Dates 2026
- Spring forward: October 4, 2026 (AEST to AEDT)
- Fall back: April 5, 2026 (AEDT to AEST)
Impact on International Scheduling
| Period | Sydney | New York (EST) | Gap |
|---|---|---|---|
| Australian winter | AEST (UTC+10) | EST (UTC-5) | 15 hours |
| Australian summer | AEDT (UTC+11) | EST (UTC-5) | 16 hours |
Quick Answer
NSW, VIC, TAS, ACT switch AEST to AEDT in October, back in April. Queensland stays on AEST year-round.