Time systems, calendar references, and timezone tools.

Time-zone reference

Australian Eastern Standard Time

AEST is the standard-time label used by major parts of eastern Australia during the non-summer part of the year.

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AEST does not describe every eastern Australian date

Australian Eastern Standard Time denotes UTC+10:00. The Sydney reference clock can use Australian Eastern Daylight Time at UTC+11:00, while other eastern locations can remain on their standard offset.

Compare Sydney and Brisbane directly when planning a call between them. An AEST label alone does not tell you whether someone means the fixed standard offset or the local clock in a city that changes seasonally.

Conversion example

09:00 AEST is 23:00 UTC on the preceding date. At UTC+11:00, a local 09:00 corresponds to 22:00 UTC on the preceding date.

A common scheduling mistake

Do not apply a northern hemisphere idea of “summer time” to Australia: its seasons occur in the opposite part of the year.

Regional rules: IANA Time Zone Database Our calculation methods

What this abbreviation usually means

This page uses Sydney as the working reference and notes where Australia’s seasonal clock changes create different local behavior by state.

Reference offset

AEST is commonly associated with UTC+10 in standard time. The live clock shows the current regional offset separately.

Representative locations

Sydney, Melbourne, Brisbane provide regional reference points. Always check each city’s local offset for the appointment date.

DST handling

This abbreviation belongs to a zone family that changes offset seasonally, so the exact relation to UTC depends on the date.

Best next step

Use the dedicated converter when you need to translate a specific meeting or timestamp between this zone and another one.

AEST conversion chart

Each hour of AEST (UTC+10) converted to other common standard-time abbreviations. “+1” and “−1” mark the next or previous calendar day.

AEST to other time zones, hour by hour
AESTUTCPSTESTGMTCETIST
00:0014:00−106:00−109:00−114:00−115:00−119:30−1
01:0015:00−107:00−110:00−115:00−116:00−120:30−1
02:0016:00−108:00−111:00−116:00−117:00−121:30−1
03:0017:00−109:00−112:00−117:00−118:00−122:30−1
04:0018:00−110:00−113:00−118:00−119:00−123:30−1
05:0019:00−111:00−114:00−119:00−120:00−100:30
06:0020:00−112:00−115:00−120:00−121:00−101:30
07:0021:00−113:00−116:00−121:00−122:00−102:30
08:0022:00−114:00−117:00−122:00−123:00−103:30
09:0023:00−115:00−118:00−123:00−100:0004:30
10:0000:0016:00−119:00−100:0001:0005:30
11:0001:0017:00−120:00−101:0002:0006:30
12:0002:0018:00−121:00−102:0003:0007:30
13:0003:0019:00−122:00−103:0004:0008:30
14:0004:0020:00−123:00−104:0005:0009:30
15:0005:0021:00−100:0005:0006:0010:30
16:0006:0022:00−101:0006:0007:0011:30
17:0007:0023:00−102:0007:0008:0012:30
18:0008:0000:0003:0008:0009:0013:30
19:0009:0001:0004:0009:0010:0014:30
20:0010:0002:0005:0010:0011:0015:30
21:0011:0003:0006:0011:0012:0016:30
22:0012:0004:0007:0012:0013:0017:30
23:0013:0005:0008:0013:0014:0018:30

The chart uses each abbreviation’s fixed standard offset. In summer many of these regions switch to daylight labels (EDT, PDT, BST, CEST, AEDT), so for a real meeting use the time zone converter with the meeting date.

Where AEST is used

These cities on our world clock use AEST during standard time and AEDT during daylight saving time:

When AEST and AEDT switch in Sydney

  • : AEST resumes — at 03:00 local time clocks go back to 02:00.
  • : AEDT begins — at 02:00 local time clocks go forward to 03:00.
  • : AEST resumes — at 03:00 local time clocks go back to 02:00.
  • : AEDT begins — at 02:00 local time clocks go forward to 03:00.

Dates for Australia/Sydney from the IANA time zone database bundled with this build. Other regions using AEST can switch on different dates.

AEST questions

What is AEST in UTC?

AEST (Australian Eastern Standard Time) is UTC+10, 10 hours ahead of UTC. To convert AEST to UTC, subtract 10 hours: 12:00 AEST is 02:00 UTC.

Is AEST the same as AEDT?

No. AEST is the standard-time label and AEDT is the daylight-saving label for the same region, one hour ahead. Most places that use AEST in winter switch to AEDT in summer, so a time written as AEST during the summer months is usually a mislabel for AEDT. When in doubt, name the city or use the IANA zone Australia/Sydney.

Which cities use AEST?

Cities on our world clock that use AEST in standard time include Sydney, Melbourne, Brisbane.

Compare AEST with related zones

These are the abbreviations people most often compare against this reference.

JST Open the JST reference page and compare it directly with AEST. UTC Open the UTC reference page and compare it directly with AEST. GMT Open the GMT reference page and compare it directly with AEST. Timezone Converter Convert a specific date and time between AEST and any other major world zone.