Adelaide
Australia
--:-- --
GMT+10:30 · UTC+9:30
30 minutes difference
Melbourne
Australia
--:-- --
GMT+11 · UTC+10

24-Hour Overlap Timeline

✅ Overlap: 9:00 AM–5:00 PM in Adelaide · 10:00 AM–6:00 PM in Melbourne (8h window)

⚠ Adelaide and Sydney observe daylight saving time — offset may vary by up to 1 hour seasonally

01234567891011121314151617181920212223
UTC →
🇦🇺 Adelaide UTC+9:30 9a 10a 11a 12p 1p 2p 3p 4p 5p 6p 7p 8p 9p 10p 11p 12a 1a 2a 3a 4a 5a 6a 7a 8a
🇦🇺 Melbourne UTC+10 10a 11a 12p 1p 2p 3p 4p 5p 6p 7p 8p 9p 10p 11p 12a 1a 2a 3a 4a 5a 6a 7a 8a 9a
Both working Working Off hours Sleeping Now

Key Facts: Adelaide (GMT+10:30) vs Melbourne (GMT+11)

Time Gap
0h 30m
Sydney ahead
May vary ±1h (DST)
DST Status
⏰ Adelaide
Observes DST
⏰ Sydney: Observes DST
Cities in GMT+10:30
1
Largest: Adelaide
1,387,290 pop.
Overlap Window
9h window
9:00 AM – 6:00 PM (GMT+10:30)
9:00 AM – 6:00 PM (GMT+11)

Find Cities in Adelaide & Sydney Timezones

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The GMT+10:30 and GMT+11 timezones are separated by 30 minutes. Adelaide is the largest city in the Australia/Adelaide zone and Melbourne is the largest in Australia/Sydney. Adelaide observes daylight saving time — the difference may change by 1 hour seasonally. For scheduling between these regions, the key fact is: there are 9 hours of mutual business-hours overlap each day.

Best Times to Schedule Calls: Adelaide (GMT+10:30) ↔ Melbourne (GMT+11)

Adelaide (GMT+10:30) Sydney (GMT+11) Quality
6:00 AM 6:00 AM
7:00 AM 7:00 AM ⚠️
8:00 AM 8:00 AM ⚠️
9:00 AM 9:00 AM
10:00 AM 10:00 AM
11:00 AM 11:00 AM
12:00 PM 12:00 PM
1:00 PM 1:00 PM
2:00 PM 2:00 PM
3:00 PM 3:00 PM
4:00 PM 4:00 PM
5:00 PM 5:00 PM
6:00 PM 6:00 PM ⚠️
7:00 PM 7:00 PM ⚠️
8:00 PM 8:00 PM
9:00 PM 9:00 PM

Work hours defined as 09:00–18:00 local time. ✅ Both in work hours  ⚠️ Borderline  ❌ Outside work hours.

GMT+10:30 to GMT+11: Complete 24-Hour Time Conversion Table

Adelaide (GMT+10:30) Sydney (GMT+11) IST (UTC+5:30)
12:00 AM 12:30 AM 8:00 PM
1:00 AM 1:30 AM 9:00 PM
2:00 AM 2:30 AM 10:00 PM
3:00 AM 3:30 AM 11:00 PM
4:00 AM 4:30 AM 12:00 AM
5:00 AM 5:30 AM 1:00 AM
6:00 AM 6:30 AM 2:00 AM
7:00 AM 7:30 AM 3:00 AM
8:00 AM 8:30 AM 4:00 AM
9:00 AM 9:30 AM 5:00 AM
10:00 AM 10:30 AM 6:00 AM
11:00 AM 11:30 AM 7:00 AM
12:00 PM 12:30 PM 8:00 AM
1:00 PM 1:30 PM 9:00 AM
2:00 PM 2:30 PM 10:00 AM
3:00 PM 3:30 PM 11:00 AM
4:00 PM 4:30 PM 12:00 PM
5:00 PM 5:30 PM 1:00 PM
6:00 PM 6:30 PM 2:00 PM
7:00 PM 7:30 PM 3:00 PM
8:00 PM 8:30 PM 4:00 PM
9:00 PM 9:30 PM 5:00 PM
10:00 PM 10:30 PM 6:00 PM
11:00 PM 11:30 PM 7:00 PM

IST (India Standard Time, UTC+5:30) shown as reference for Indian users. +1/−1 indicates a different calendar day.

1 Cities in Adelaide (GMT+10:30) & 13 Cities in Sydney (GMT+11)

Adelaide & cities — Adelaide (GMT+10:30, UTC+9:30)

Melbourne & 12 more — Sydney (GMT+11, UTC+10)

⚠️ Daylight Saving Time Affects This Pair

TimezoneDST?StandardDaylight
Australia/Adelaide Yes UTC+9:30 UTC+10.5
Australia/Sydney Yes UTC+10 UTC+11

During DST periods the time difference between these zones may be 30 minutes instead of 30 minutes. Always verify the current offset if scheduling calls near clock-change dates.