ACST to Toronto
-13h 30mACST
ACSTSOURCEToronto
EDTGreen rows indicate typical business hours (9 AM - 5 PM)
ACST and EDT on the World Map
The map below highlights the ACST (Australian Central Standard Time) and EDT (Eastern Standard Time) timezone regions across the globe.
ACST – Australian Central Standard Time
UTC+09:30Australian Central Standard Time (ACST, UTC+09:30) covers South Australia and the Northern Territory, on a half-hour offset.
- •ACST uses a half-hour offset: UTC+09:30.
- •South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
- •Adelaide and Darwin are 30 minutes apart during daylight saving, level in winter.
- •Adelaide is one of the few major cities on a 30-minute offset.
EST – Eastern Standard Time
UTC-05:00Eastern Standard Time (EST) is the time zone for the eastern United States and Canada, 5 hours behind UTC.
- •EST is the most widely used time zone in the United States by population.
- •The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
- •23 US states are fully or partially in the Eastern Time Zone.
- •EST was established by the Standard Time Act of 1918.
- •Over 47% of the US population lives in the Eastern Time Zone.
About Toronto
WikipediaToronto shares Eastern Time (EST/EDT) with New York. As Canada's largest city and financial center, Toronto's TSX is among North America's largest stock exchanges.
Toronto is the most multicultural city in the world - over 50% of residents were born outside Canada.
Time Conversion Guide: ACST to Toronto
ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. Toronto runs on Eastern Daylight Time (EDT) at UTC-04:00, also currently on daylight saving time. That puts ACST 13 hours 30 minutes behind Toronto — a difference of -13h 30m at the current offsets.
In practice, when it is 9:00 AM in ACST it is 7:30 PM in Toronto on the previous day. Midnight in ACST is 10:30 AM in Toronto.Toronto observes daylight saving time while ACST does not, so the gap narrows or widens by an hour part of the year.
ACST to Toronto time conversion table
| ACST (ACST) | Toronto (EDT) | Day |
|---|---|---|
| 12:00 AM | 10:30 AM | previous day |
| 6:00 AM | 4:30 PM | previous day |
| 7:00 AM | 5:30 PM | previous day |
| 8:00 AM | 6:30 PM | previous day |
| 9:00 AM | 7:30 PM | previous day |
| 12:00 PM | 10:30 PM | previous day |
| 3:00 PM | 1:30 AM | same day |
| 5:00 PM | 3:30 AM | same day |
| 6:00 PM | 4:30 AM | same day |
| 9:00 PM | 7:30 AM | same day |
Why people convert ACST to Toronto time
- Scheduling a call from ACST to Toronto: a 10:00 AM start in ACST lands at 8:30 PM in Toronto the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -13h 30m gap: ACST and Toronto 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 Toronto is 7:30 PM in ACST.
- Keeping family and friends in sync: knowing that 8:00 PM in ACST is 6:30 AM in Toronto makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM ACST" is unambiguous; "3 PM" across a -13h 30m gap is not.
- With a -13h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week ACST takes the early slot, the next week Toronto does.
- Toronto: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
About ACST (Australian Central Standard Time)
Australian Central Standard Time (ACST) is the half-hour offset of UTC+09:30 used across South Australia and the Northern Territory, taking in Adelaide and Darwin. South Australia moves to Australian Central Daylight Time (ACDT, UTC+10:30) from the first Sunday in October to the first Sunday in April, but the Northern Territory does not observe daylight saving — so Adelaide and Darwin sit 30 minutes apart in summer and level with each other in winter. The half-hour offset means Adelaide is 30 minutes behind Sydney in winter and level with it during daylight saving, which regularly catches out travellers and meeting planners.
About EST (Eastern Standard Time)
Eastern Standard Time (EST) is observed during the winter months in the eastern part of North America. It covers 23 US states and parts of Canada including Ontario and Quebec. EST is the most populous time zone in the United States, home to major financial centers like New York City and global organizations headquartered in Washington D.C. During daylight saving time (March–November), clocks shift to Eastern Daylight Time (EDT, UTC-04:00). The time zone also covers parts of the Caribbean and Central America including Panama, Jamaica, and the Cayman Islands.
Best time to call between ACST and Toronto
With a -13h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Toronto opens at 9:00 AM EDT, which is 7:30 PM in ACST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
ACST and Toronto have no shared working hours because of the -13h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
ACST is 13 hours 30 minutes behind Toronto (ACST UTC+09:30 → EDT UTC-04:00). 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
ACST
❄ Currently in Standard Time
Standard: UTC+09:30 · DST: UTC+10:30
Clocks spring forward on Sat, Oct 3, 2026
Toronto
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
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 ACST and Toronto?
ACST (ACST, UTC+09:30) is 13 hours 30 minutes behind Toronto (EDT, UTC-04:00). The gap is currently -13h 30m.
How do I convert ACST time to Toronto time?
Add -13h 30m to ACST local time. For example, 9:00 AM in ACST is 7:30 PM in Toronto (previous day).
What time is it in Toronto right now?
Toronto uses EDT at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -13h 30m offset from ACST.
What is the best time to call Toronto from ACST?
There is no shared working-hours window because of the -13h 30m gap. The closest option is 1:00 PM in ACST, which is 11:30 PM in Toronto.
Which is behind, ACST or Toronto?
ACST is 13 hours 30 minutes behind Toronto. When it is 12:00 PM in ACST it is 10:30 PM in Toronto.
Do ACST and Toronto use different time zones?
ACST uses ACST at UTC+09:30, while Toronto (Canada) uses EDT at UTC-04:00. The IANA identifiers are Australia/Adelaide and America/Toronto.
Does daylight saving time affect the ACST–Toronto difference?
Yes at the moment: Toronto is on daylight saving time and ACST is not, so the -13h 30m gap shifts by an hour when exactly one of them changes clocks.
Which other cities share ACST's time zone?
ACST also covers Adelaide, Darwin, Alice Springs, Mount Gambier.
Which countries use ACST, ACST's zone?
ACST is used in Australia (South Australia, Northern Territory).
Is there a day difference between ACST and Toronto?
Sometimes. The -13h 30m gap is large enough that 8:00 PM or later in ACST already falls on the in Toronto.
What is the time difference between ACST and Toronto?
Toronto is -13h 30m from ACST.
What timezone is ACST in?
ACST operates on its local timezone.
What timezone is Toronto in?
Toronto shares Eastern Time (EST/EDT) with New York. As Canada's largest city and financial center, Toronto's TSX is among North America's largest stock exchanges.
What are the business hours in Toronto?
Standard business hours in Toronto are 9:00 AM - 5:00 PM EST.
Which countries use ACST (Australian Central Standard Time)?
ACST is used in Australia (South Australia, Northern Territory).
Does ACST observe daylight saving time?
Yes, ACST switches to ACDT during summer months.
What are some interesting facts about ACST?
ACST uses a half-hour offset: UTC+09:30. South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
Which cities are in the EST timezone?
Major cities in the EST timezone include New York City, Washington D.C., Miami, Toronto, Philadelphia, Atlanta, Boston, Montreal.
What is the UTC offset for EST?
Eastern Standard Time (EST) is at UTC-05:00. During daylight saving time, it shifts to EDT.
What should I know about the EST timezone?
EST is the most widely used time zone in the United States by population. The New York Stock Exchange (NYSE) and NASDAQ operate on Eastern Time, opening at 9:30 AM EST.
When is it midnight in ACST, what time is it in Toronto?
When it is 12:00 AM (midnight) in ACST (ACST), it is -13h 30m later in Toronto (EST).
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