CST to AEDT
+17hCST
CSTSOURCEAEDT
AEDTGreen rows indicate typical business hours (9 AM - 5 PM)
CST and AEDT on the World Map
The map below highlights the CST (Central Standard Time) and AEDT (Australian Eastern Daylight Time) timezone regions across the globe.
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.
AEDT – Australian Eastern Daylight Time
UTC+11:00Australian Eastern Daylight Time (AEDT, UTC+11:00) is the daylight saving period in south-eastern Australia, from October to April.
- •AEDT runs from the first Sunday in October to the first Sunday in April.
- •AEDT is one hour ahead of Australian Eastern Standard Time (AEST).
- •Queensland does not observe daylight saving, so Brisbane stays on AEST.
- •During AEDT, Sydney is 16 hours ahead of New York and 11 hours ahead of UTC.
Understanding the +17h Gap: CST vs AEDT
CST runs on Central Standard Time (CST) at UTC-06:00. AEDT runs on Australian Eastern Daylight Time (AEDT) at UTC+11:00. That puts CST 17 hours ahead of AEDT — a difference of +17h at the current offsets.
In practice, when it is 9:00 AM in CST it is 2:00 AM in AEDT on the next day. Midnight in CST is 5:00 PM in AEDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
CST to AEDT time conversion table
| CST (CST) | AEDT (AEDT) | Day |
|---|---|---|
| 12:00 AM | 5:00 PM | same day |
| 6:00 AM | 11:00 PM | same day |
| 7:00 AM | 12:00 AM | next day |
| 8:00 AM | 1:00 AM | next day |
| 9:00 AM | 2:00 AM | next day |
| 12:00 PM | 5:00 AM | next day |
| 3:00 PM | 8:00 AM | next day |
| 5:00 PM | 10:00 AM | next day |
| 6:00 PM | 11:00 AM | next day |
| 9:00 PM | 2:00 PM | next day |
Why people convert CST to AEDT time
- Scheduling a call from CST to AEDT: a 10:00 AM start in CST lands at 3:00 AM in AEDT the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +17h gap: CST and AEDT 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 AEDT is 2:00 AM in CST.
- Coordinating a CST-based team with AEDT contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM CST" is unambiguous; "3 PM" across a +17h gap is not.
- With a +17h gap there is no shared 9-to-5 window, so alternate the early start: one week CST takes the early slot, the next week AEDT does.
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.
About AEDT (Australian Eastern Daylight Time)
Australian Eastern Daylight Time (AEDT) is the daylight saving period in south-eastern Australia, one hour ahead of Australian Eastern Standard Time (AEST, UTC+10:00). Because Australia is in the southern hemisphere, AEDT runs through the summer — from the first Sunday in October to the first Sunday in April — which is almost exactly the reverse of the European and North American schedules. New South Wales, Victoria, Tasmania and the Australian Capital Territory observe it; Queensland and the Northern Territory do not, so Brisbane stays on AEST year round while Sydney moves to AEDT. During AEDT, Sydney is 11 hours ahead of UTC and 16 hours ahead of New York.
Best time to call between CST and AEDT
With a +17h offset there is no overlap inside a normal 9 AM – 5 PM day. AEDT opens at 9:00 AM AEDT, which is 2:00 AM in CST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
CST and AEDT have no shared working hours because of the +17h gap. Teams need to alternate early starts or rely on asynchronous handovers.
CST is 17 hours ahead of AEDT (CST UTC-06:00 → AEDT UTC+11:00). 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
CST
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
AEDT
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 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 CST and AEDT?
CST (CST, UTC-06:00) is 17 hours ahead of AEDT (AEDT, UTC+11:00). The gap is currently +17h.
How do I convert CST time to AEDT time?
Add +17h to CST local time. For example, 9:00 AM in CST is 2:00 AM in AEDT (next day).
What time is it in AEDT right now?
AEDT uses AEDT at UTC+11:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +17h offset from CST.
What is the best time to call AEDT from CST?
There is no shared working-hours window because of the +17h gap. The closest option is 1:00 PM in CST, which is 6:00 AM in AEDT.
Which is ahead, CST or AEDT?
CST is 17 hours ahead of AEDT. When it is 12:00 PM in CST it is 5:00 AM in AEDT.
Does daylight saving time affect the CST–AEDT difference?
Neither zone observes daylight saving time, so the +17h offset between CST and AEDT is fixed all year.
Which other cities share CST's time zone?
CST also covers Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis and 6 more.
Which countries use CST, CST's zone?
CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and 1 more.
Is there a day difference between CST and AEDT?
Sometimes. The +17h gap is large enough that 8:00 PM or later in CST already falls on the next day in AEDT.
What is the time difference between CST and AEDT?
AEDT is +17h from CST.
What timezone is CST in?
CST operates on its local timezone.
What timezone is AEDT in?
AEDT operates on its local timezone.
Which countries use CST (Central Standard Time)?
CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, and 3 more countries.
Does CST observe daylight saving time?
Yes, CST switches to CDT during summer months.
What are some interesting facts about CST?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
Which cities are in the AEDT timezone?
Major cities in the AEDT timezone include Sydney, Melbourne, Canberra, Hobart, Newcastle.
What is the UTC offset for AEDT?
Australian Eastern Daylight Time (AEDT) is at UTC+11:00. During daylight saving time, it shifts to AEDT.
What should I know about the AEDT timezone?
AEDT runs from the first Sunday in October to the first Sunday in April. AEDT is one hour ahead of Australian Eastern Standard Time (AEST).
When is it midnight in CST, what time is it in AEDT?
When it is 12:00 AM (midnight) in CST (CST), it is +17h later in AEDT (AEDT).
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See every conversion from CST →·See every conversion from AEDT →