CST to AEDT Converter & Meeting Planner
Quick answer: 9:00 AM CST = 2:00 AM AEDT (fixed -06:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Central Standard Time (CST) and Australian Eastern Daylight Time (AEDT)? You need to account for the standard time difference. Australian Eastern Daylight Time is normally 17 hours ahead of Central Standard Time. Whether you are coordinating between teams in Chicago and Dallas and Sydney and Melbourne, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM CST = 5:00 PM AEDT. The full 24-hour CST to AEDT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM CST = 8:00 AM AEDT (+1 day).
| CST Time | AEDT Time |
|---|---|
| 12:00 AM (00:00) | 5:00 PM (17:00) |
| 1:00 AM (01:00) | 6:00 PM (18:00) |
| 2:00 AM (02:00) | 7:00 PM (19:00) |
| 3:00 AM (03:00) | 8:00 PM (20:00) |
| 4:00 AM (04:00) | 9:00 PM (21:00) |
| 5:00 AM (05:00) | 10:00 PM (22:00) |
| 6:00 AM (06:00) | 11:00 PM (23:00) |
| 7:00 AM (07:00) | 12:00 AM (00:00)+1 day |
| 8:00 AM (08:00) | 1:00 AM (01:00)+1 day |
| 9:00 AM (09:00) | 2:00 AM (02:00)+1 day |
| 10:00 AM (10:00) | 3:00 AM (03:00)+1 day |
| 11:00 AM (11:00) | 4:00 AM (04:00)+1 day |
| 12:00 PM (12:00) | 5:00 AM (05:00)+1 day |
| 1:00 PM (13:00) | 6:00 AM (06:00)+1 day |
| 2:00 PM (14:00) | 7:00 AM (07:00)+1 day |
| 3:00 PM (15:00) | 8:00 AM (08:00)+1 day |
| 4:00 PM (16:00) | 9:00 AM (09:00)+1 day |
| 5:00 PM (17:00) | 10:00 AM (10:00)+1 day |
| 6:00 PM (18:00) | 11:00 AM (11:00)+1 day |
| 7:00 PM (19:00) | 12:00 PM (12:00)+1 day |
| 8:00 PM (20:00) | 1:00 PM (13:00)+1 day |
| 9:00 PM (21:00) | 2:00 PM (14:00)+1 day |
| 10:00 PM (22:00) | 3:00 PM (15:00)+1 day |
| 11:00 PM (23:00) | 4:00 PM (16:00)+1 day |
Best time to call Sydney from Chicago
For most work calls, compare the normal business day in Chicago (CST) with the business day in Sydney (AEDT). CST commonly covers North America, Central America, while AEDT is mainly associated with Oceania, Eastern Australia.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
⚠️ There is no clean same-day business-hours overlap on 2026-07-05. A practical compromise is around 6:00 PM CST, which reaches 9:00 AM AEDT near the start of their workday.
- DST Safety: CST or AEDT may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Australian Securities Exchange (ASX): 10:00-16:00 local time in Sydney.
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Frequently Asked Questions
What is the time difference between CST and AEDT?
During standard time, Australian Eastern Daylight Time is 17 hours ahead of Central Standard Time.
Is CST the same as Central Time (CT)?
Central Time (CT) is the umbrella term for the zone, while CST and CDT refer to its two seasonal offsets. CST (UTC-6) applies during standard time from November through March, and CDT (UTC-5) applies during Daylight Saving Time from March through November.
Does Mexico City use CST?
Mexico City operates on UTC-6, the same offset as CST, but it does not observe Daylight Saving Time following Mexico's elimination of the practice under a 2022 law. This means Mexico City stays at UTC-6 year-round while US and Canadian Central Time cities shift to UTC-5 each summer.
When does AEDT start and end?
AEDT begins on the first Sunday in October at 02:00 local time, when clocks spring forward one hour from AEST (UTC+10) to AEDT (UTC+11). It ends on the first Sunday in April at 03:00 local time, when clocks fall back to AEST. In 2026, AEDT starts on October 4 and ends on April 5 — following the Southern Hemisphere summer calendar, which runs opposite to DST schedules in Europe and North America.
Is Brisbane on AEDT?
No — Queensland, including Brisbane, does not observe Daylight Saving Time and remains on AEST (UTC+10) year-round. During the AEDT period from October through April, Sydney and Melbourne advance to UTC+11 while Brisbane stays at UTC+10, creating a one-hour gap between cities that share nearly the same longitude and are otherwise in the same time zone for the other six months of the year.