Colombo to AEDT
+5h 30mColombo
ISTSOURCEAEDT
AEDTGreen rows indicate typical business hours (9 AM - 5 PM)
IST and AEDT on the World Map
The map below highlights the IST (India Standard Time) and AEDT (Australian Eastern Daylight Time) timezone regions across the globe.
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.
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.
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.
Colombo to AEDT Time Difference – Complete Guide
Colombo runs on India Standard Time (IST) at UTC+05:30. AEDT runs on Australian Eastern Daylight Time (AEDT) at UTC+11:00. That puts Colombo 5 hours 30 minutes ahead of AEDT — a difference of +5h 30m at the current offsets.
In practice, when it is 9:00 AM in Colombo it is 2:30 PM in AEDT. Midnight in Colombo is 5:30 AM in AEDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Colombo to AEDT time conversion table
| Colombo (IST) | AEDT (AEDT) | Day |
|---|---|---|
| 12:00 AM | 5:30 AM | same day |
| 6:00 AM | 11:30 AM | same day |
| 7:00 AM | 12:30 PM | same day |
| 8:00 AM | 1:30 PM | same day |
| 9:00 AM | 2:30 PM | same day |
| 12:00 PM | 5:30 PM | same day |
| 3:00 PM | 8:30 PM | same day |
| 5:00 PM | 10:30 PM | same day |
| 6:00 PM | 11:30 PM | same day |
| 9:00 PM | 2:30 AM | next day |
Why people convert Colombo to AEDT time
- Scheduling a call from Colombo to AEDT: a 10:00 AM start in Colombo lands at 3:30 PM in AEDT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Colombo and AEDT are inside the 9-to-5 working day between 9:00 AM and 11:30 AM IST time (2:30 PM–5:00 PM AEDT). That is roughly 2 hours 30 minutes of usable overlap.
- Watching a live event or market open: Colombo viewers need 2:30 PM in AEDT to catch a 9:00 AM start there, and 6:30 PM if the event is anchored to Colombo.
- Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a +5h 30m gap is not.
- Block 9:00 AM–11:30 AM IST as the recurring meeting window if you work primarily from Colombo and need AEDT colleagues present.
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.
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 Colombo and AEDT
Both Colombo and AEDT sit inside the 9 AM – 5 PM working day between 9:00 AM–11:30 AM IST, which is 2:30 PM–5:00 PM AEDT. That gives roughly 2 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Colombo and AEDT overlap for about 2 hours during the working day — enough for meetings if you avoid the edges of the window.
Colombo is 5 hours 30 minutes ahead of AEDT (IST UTC+05:30 → AEDT UTC+11:00). The shared working window is 9:00 AM–11:30 AM IST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Colombo
Does not observe DST
AEDT
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
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 Colombo and AEDT?
Colombo (IST, UTC+05:30) is 5 hours 30 minutes ahead of AEDT (AEDT, UTC+11:00). The gap is currently +5h 30m.
How do I convert Colombo time to AEDT time?
Add +5h 30m to Colombo local time. For example, 9:00 AM in Colombo is 2:30 PM in AEDT.
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 +5h 30m offset from Colombo.
What is the best time to call AEDT from Colombo?
Call between 9:00 AM and 11:30 AM IST — that maps to 2:30 PM–5:00 PM AEDT and keeps both parties inside the working day.
Which is ahead, Colombo or AEDT?
Colombo is 5 hours 30 minutes ahead of AEDT. When it is 12:00 PM in Colombo it is 5:30 PM in AEDT.
Do Colombo and AEDT use different time zones?
Colombo (Sri Lanka) uses IST at UTC+05:30, while AEDT uses AEDT at UTC+11:00. The IANA identifiers are Asia/Colombo and Australia/Sydney.
Does daylight saving time affect the Colombo–AEDT difference?
Neither zone observes daylight saving time, so the +5h 30m offset between Colombo and AEDT is fixed all year.
Which other cities share Colombo's time zone?
IST also covers Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad and 4 more.
Which countries use IST, Colombo's zone?
IST is used in India, Sri Lanka.
Is there a day difference between Colombo and AEDT?
Not normally. The +5h 30m gap only pushes the date over for late-evening times.
What is the time difference between Colombo and AEDT?
AEDT is +5h 30m from Colombo.
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 timezone is AEDT in?
AEDT operates on its local timezone.
What are the business hours in Colombo?
Standard business hours in Colombo are 9:00 AM - 5:00 PM IST.
Which countries use IST (India Standard Time)?
IST is used in India, Sri Lanka.
Does IST observe daylight saving time?
No, IST does not observe daylight saving time and remains at UTC+05:30 year-round.
What are some interesting facts about IST?
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.
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 Colombo, what time is it in AEDT?
When it is 12:00 AM (midnight) in Colombo (IST), it is +5h 30m later in AEDT (AEDT).
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