AEST to CST
-16hAEST
AESTSOURCECST
CSTGreen rows indicate typical business hours (9 AM - 5 PM)
AEST and CST on the World Map
The map below highlights the AEST (Australian Eastern Standard Time) and CST (Central Standard Time) timezone regions across the globe.
AEST – Australian Eastern Standard Time
UTC+10:00Australian Eastern Standard Time (AEST) covers eastern Australia, 10 hours ahead of UTC.
- •Queensland does not observe daylight saving time, staying on AEST year-round.
- •Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
- •The Australian Securities Exchange (ASX) operates on AEST/AEDT.
- •AEST is 15 hours ahead of EST during winter.
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •CST covers 20 US states fully or partially.
- •Chicago and Houston are the two largest cities in the Central Time Zone.
- •Mexico City, one of the world's most populous cities, operates on CST.
- •CST is 1 hour behind EST and 2 hours ahead of PST.
Comparing Time Zones: AEST and CST
AEST runs on Australian Eastern Standard Time (AEST) at UTC+10:00. CST runs on Central Standard Time (CST) at UTC-06:00. That puts AEST 16 hours behind CST — a difference of -16h at the current offsets.
In practice, when it is 9:00 AM in AEST it is 5:00 PM in CST on the previous day. Midnight in AEST is 8:00 AM in CST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
AEST to CST time conversion table
| AEST (AEST) | CST (CST) | Day |
|---|---|---|
| 12:00 AM | 8:00 AM | previous day |
| 6:00 AM | 2:00 PM | previous day |
| 7:00 AM | 3:00 PM | previous day |
| 8:00 AM | 4:00 PM | previous day |
| 9:00 AM | 5:00 PM | previous day |
| 12:00 PM | 8:00 PM | previous day |
| 3:00 PM | 11:00 PM | previous day |
| 5:00 PM | 1:00 AM | same day |
| 6:00 PM | 2:00 AM | same day |
| 9:00 PM | 5:00 AM | same day |
Why people convert AEST to CST time
- Scheduling a call from AEST to CST: a 10:00 AM start in AEST lands at 6:00 PM in CST the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -16h gap: AEST and CST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in CST is 5:00 PM in AEST.
- Watching a live event or market open: AEST viewers need 5:00 PM in CST to catch a 9:00 AM start there, and 4:00 PM if the event is anchored to AEST.
- Always state the zone abbreviation, not just the hour. "3:00 PM AEST" is unambiguous; "3 PM" across a -16h gap is not.
- With a -16h gap there is no shared 9-to-5 window, so alternate the early start: one week AEST takes the early slot, the next week CST does.
About AEST (Australian Eastern Standard Time)
Australian Eastern Standard Time (AEST) is used in the eastern states of Australia including New South Wales, Victoria, Queensland, Tasmania, and the ACT. During summer (October to April), NSW, VIC, TAS, and ACT switch to Australian Eastern Daylight Time (AEDT, UTC+11:00), while Queensland remains on AEST year-round.
About CST (Central Standard Time)
Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.
Best time to call between AEST and CST
With a -16h offset there is no overlap inside a normal 9 AM – 5 PM day. CST opens at 9:00 AM CST, which is 5:00 PM in AEST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
AEST and CST have no shared working hours because of the -16h gap. Teams need to alternate early starts or rely on asynchronous handovers.
AEST is 16 hours behind CST (AEST UTC+10:00 → CST UTC-06:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
AEST
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
CST
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
⚠ These locations are currently in different DST states, so the time difference may change when clocks adjust.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between AEST and CST?
AEST (AEST, UTC+10:00) is 16 hours behind CST (CST, UTC-06:00). The gap is currently -16h.
How do I convert AEST time to CST time?
Add -16h to AEST local time. For example, 9:00 AM in AEST is 5:00 PM in CST (previous day).
What time is it in CST right now?
CST uses CST at UTC-06:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -16h offset from AEST.
What is the best time to call CST from AEST?
There is no shared working-hours window because of the -16h gap. The closest option is 1:00 PM in AEST, which is 9:00 PM in CST.
Which is behind, AEST or CST?
AEST is 16 hours behind CST. When it is 12:00 PM in AEST it is 8:00 PM in CST.
Does daylight saving time affect the AEST–CST difference?
Neither zone observes daylight saving time, so the -16h offset between AEST and CST is fixed all year.
Which other cities share AEST's time zone?
AEST also covers Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.
Which countries use AEST, AEST's zone?
AEST is used in Australia (NSW, VIC, QLD, TAS, ACT), Papua New Guinea.
Is there a day difference between AEST and CST?
Sometimes. The -16h gap is large enough that 8:00 PM or later in AEST already falls on the in CST.
What is the time difference between AEST and CST?
CST is -16h from AEST.
What timezone is AEST in?
AEST operates on its local timezone.
What timezone is CST in?
CST operates on its local timezone.
Which countries use AEST (Australian Eastern Standard Time)?
AEST is used in Australia (NSW, VIC, QLD, TAS, ACT), Papua New Guinea.
Does AEST observe daylight saving time?
Yes, AEST switches to AEDT during summer months.
What are some interesting facts about AEST?
Queensland does not observe daylight saving time, staying on AEST year-round. Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
Which cities are in the CST timezone?
Major cities in the CST timezone include Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis.
What is the UTC offset for CST?
Central Standard Time (CST) is at UTC-06:00. During daylight saving time, it shifts to CDT.
What should I know about the CST timezone?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
When is it midnight in AEST, what time is it in CST?
When it is 12:00 AM (midnight) in AEST (AEST), it is -16h later in CST (CST).
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See every conversion from AEST →·See every conversion from CST →