AEDT to Colombo
-5h 30mAEDT
AEDTSOURCEColombo
ISTGreen rows indicate typical business hours (9 AM - 5 PM)
AEDT and IST on the World Map
The map below highlights the AEDT (Australian Eastern Daylight Time) and IST (India Standard Time) timezone regions across the globe.
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.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
- •India uses a single time zone despite spanning 30° of longitude.
- •IST is one of only a handful of time zones with a 30-minute offset.
- •IST is the most populous single time zone in the world with over 1.4 billion people.
- •The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.
About Colombo
WikipediaColombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.
Sri Lanka Standard Time (SLST) uses UTC+5:30, same offset as India.
Comparing Time Zones: AEDT and Colombo
AEDT runs on Australian Eastern Daylight Time (AEDT) at UTC+11:00. Colombo runs on India Standard Time (IST) at UTC+05:30. That puts AEDT 5 hours 30 minutes behind Colombo — a difference of -5h 30m at the current offsets.
In practice, when it is 9:00 AM in AEDT it is 3:30 AM in Colombo. Midnight in AEDT is 6:30 PM in Colombo. Neither zone observes daylight saving time, so the offset between them stays constant all year.
AEDT to Colombo time conversion table
| AEDT (AEDT) | Colombo (IST) | Day |
|---|---|---|
| 12:00 AM | 6:30 PM | previous day |
| 6:00 AM | 12:30 AM | same day |
| 7:00 AM | 1:30 AM | same day |
| 8:00 AM | 2:30 AM | same day |
| 9:00 AM | 3:30 AM | same day |
| 12:00 PM | 6:30 AM | same day |
| 3:00 PM | 9:30 AM | same day |
| 5:00 PM | 11:30 AM | same day |
| 6:00 PM | 12:30 PM | same day |
| 9:00 PM | 3:30 PM | same day |
Why people convert AEDT to Colombo time
- Scheduling a call from AEDT to Colombo: a 10:00 AM start in AEDT lands at 4:30 AM in Colombo, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both AEDT and Colombo are inside the 9-to-5 working day between 2:30 PM and 5:00 PM AEDT time (9:00 AM–11:30 AM IST). That is roughly 2 hours 30 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in AEDT is 2:30 PM in Colombo makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM AEDT" is unambiguous; "3 PM" across a -5h 30m gap is not.
- Block 2:30 PM–5:00 PM AEDT as the recurring meeting window if you work primarily from AEDT and need Colombo colleagues present.
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.
About IST (India Standard Time)
India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.
Best time to call between AEDT and Colombo
Both AEDT and Colombo sit inside the 9 AM – 5 PM working day between 2:30 PM–5:00 PM AEDT, which is 9:00 AM–11:30 AM IST. That gives roughly 2 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
AEDT and Colombo overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
AEDT is 5 hours 30 minutes behind Colombo (AEDT UTC+11:00 → IST UTC+05:30). The shared working window is 2:30 PM–5:00 PM AEDT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
AEDT
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
Colombo
Does not observe DST
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 AEDT and Colombo?
AEDT (AEDT, UTC+11:00) is 5 hours 30 minutes behind Colombo (IST, UTC+05:30). The gap is currently -5h 30m.
How do I convert AEDT time to Colombo time?
Add -5h 30m to AEDT local time. For example, 9:00 AM in AEDT is 3:30 AM in Colombo.
What time is it in Colombo right now?
Colombo uses IST at UTC+05:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -5h 30m offset from AEDT.
What is the best time to call Colombo from AEDT?
Call between 2:30 PM and 5:00 PM AEDT — that maps to 9:00 AM–11:30 AM IST and keeps both parties inside the working day.
Which is behind, AEDT or Colombo?
AEDT is 5 hours 30 minutes behind Colombo. When it is 12:00 PM in AEDT it is 6:30 AM in Colombo.
Do AEDT and Colombo use different time zones?
AEDT uses AEDT at UTC+11:00, while Colombo (Sri Lanka) uses IST at UTC+05:30. The IANA identifiers are Australia/Sydney and Asia/Colombo.
Does daylight saving time affect the AEDT–Colombo difference?
Neither zone observes daylight saving time, so the -5h 30m offset between AEDT and Colombo is fixed all year.
Which other cities share AEDT's time zone?
AEDT also covers Sydney, Melbourne, Canberra, Hobart, Newcastle.
Which countries use AEDT, AEDT's zone?
AEDT is used in Australia (NSW, Victoria, Tasmania, ACT).
Is there a day difference between AEDT and Colombo?
Not normally. The -5h 30m gap only pushes the date over the previous day.
What is the time difference between AEDT and Colombo?
Colombo is -5h 30m from AEDT.
What timezone is AEDT in?
AEDT operates on its local timezone.
What timezone is Colombo in?
Colombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.
What are the business hours in Colombo?
Standard business hours in Colombo are 9:00 AM - 5:00 PM IST.
Which countries use AEDT (Australian Eastern Daylight Time)?
AEDT is used in Australia (NSW, Victoria, Tasmania, ACT).
Does AEDT observe daylight saving time?
Yes, AEDT switches to AEDT during summer months.
What are some interesting facts about AEDT?
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).
Which cities are in the IST timezone?
Major cities in the IST timezone include Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad.
What is the UTC offset for IST?
India Standard Time (IST) is at UTC+05:30.
What should I know about the IST timezone?
India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT. India uses a single time zone despite spanning 30° of longitude.
When is it midnight in AEDT, what time is it in Colombo?
When it is 12:00 AM (midnight) in AEDT (AEDT), it is -5h 30m later in Colombo (IST).
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