Colombo to Anchorage
-13h 30mColombo
ISTSOURCEAnchorage
AKDTGreen rows indicate typical business hours (9 AM - 5 PM)
IST and AKDT on the World Map
The map below highlights the IST (India Standard Time) and AKDT (Alaska Standard 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.
AKST – Alaska Standard Time
UTC-09:00Alaska Standard Time (AKST) is the time zone for the state of Alaska, 9 hours behind UTC.
- •Alaska is the largest US state by area but has only about 730,000 residents.
- •Anchorage is the most populous city in AKST with about 290,000 people.
- •The Aleutian Islands use HAST instead of AKST.
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.
About Anchorage
WikipediaAnchorage operates on Alaska Time (AKST/AKDT), UTC-9. As a global air cargo hub, Anchorage connects Asian and American markets via polar routes.
Moose occasionally wander through the city streets.
Colombo to Anchorage Time Difference – Complete Guide
Colombo runs on India Standard Time (IST) at UTC+05:30. Anchorage runs on Alaska Daylight Time (AKDT) at UTC-08:00, also currently on daylight saving time. That puts Colombo 13 hours 30 minutes behind Anchorage — a difference of -13h 30m at the current offsets.
In practice, when it is 9:00 AM in Colombo it is 7:30 PM in Anchorage on the previous day. Midnight in Colombo is 10:30 AM in Anchorage.Anchorage observes daylight saving time while Colombo does not, so the gap narrows or widens by an hour part of the year.
Colombo to Anchorage time conversion table
| Colombo (IST) | Anchorage (AKDT) | 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 Colombo to Anchorage time
- Scheduling a call from Colombo to Anchorage: a 10:00 AM start in Colombo lands at 8:30 PM in Anchorage the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -13h 30m gap: Colombo and Anchorage 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 Anchorage is 7:30 PM in Colombo.
- Watching a live event or market open: Colombo viewers need 7:30 PM in Anchorage to catch a 9:00 AM start there, and 1:30 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 -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 Colombo takes the early slot, the next week Anchorage does.
- Anchorage: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
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 AKST (Alaska Standard Time)
Alaska Standard Time (AKST) is used in nearly all of Alaska. Due to Alaska's vast geographic size, the Aleutian Islands use Hawaii-Aleutian Standard Time instead. During summer months, Alaska switches to Alaska Daylight Time (AKDT, UTC-08:00).
Best time to call between Colombo and Anchorage
With a -13h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Anchorage opens at 9:00 AM AKDT, which is 7:30 PM in Colombo, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Colombo and Anchorage have no shared working hours because of the -13h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
Colombo is 13 hours 30 minutes behind Anchorage (IST UTC+05:30 → AKDT UTC-08:00). 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
Colombo
Does not observe DST
Anchorage
☀ Currently in DST
Standard: UTC-09:00 · DST: UTC-08:00
Clocks fall back on Sun, Nov 1, 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 Anchorage?
Colombo (IST, UTC+05:30) is 13 hours 30 minutes behind Anchorage (AKDT, UTC-08:00). The gap is currently -13h 30m.
How do I convert Colombo time to Anchorage time?
Add -13h 30m to Colombo local time. For example, 9:00 AM in Colombo is 7:30 PM in Anchorage (previous day).
What time is it in Anchorage right now?
Anchorage uses AKDT at UTC-08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -13h 30m offset from Colombo.
What is the best time to call Anchorage from Colombo?
There is no shared working-hours window because of the -13h 30m gap. The closest option is 1:00 PM in Colombo, which is 11:30 PM in Anchorage.
Which is behind, Colombo or Anchorage?
Colombo is 13 hours 30 minutes behind Anchorage. When it is 12:00 PM in Colombo it is 10:30 PM in Anchorage.
Do Colombo and Anchorage use different time zones?
Colombo (Sri Lanka) uses IST at UTC+05:30, while Anchorage (USA) uses AKDT at UTC-08:00. The IANA identifiers are Asia/Colombo and America/Anchorage.
Does daylight saving time affect the Colombo–Anchorage difference?
Yes at the moment: Anchorage is on daylight saving time and Colombo is not, so the -13h 30m gap shifts by an hour when exactly one of them changes clocks.
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 Anchorage?
Sometimes. The -13h 30m gap is large enough that 8:00 PM or later in Colombo already falls on the in Anchorage.
What is the time difference between Colombo and Anchorage?
Anchorage is -13h 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 Anchorage in?
Anchorage operates on Alaska Time (AKST/AKDT), UTC-9. As a global air cargo hub, Anchorage connects Asian and American markets via polar routes.
What are the business hours in Colombo?
Standard business hours in Colombo are 9:00 AM - 5:00 PM IST.
What are the business hours in Anchorage?
Standard business hours in Anchorage are 8:00 AM - 5:00 PM AKST.
What is the best time to schedule a call between Colombo and Anchorage?
The best overlap for a call is when both cities are in business hours. Colombo works 9:00 AM - 5:00 PM IST and Anchorage works 8:00 AM - 5:00 PM AKST (-13h 30m difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Colombo and Anchorage?
Colombo uses LKR (Rs) while Anchorage uses USD ($). Check current exchange rates when planning travel or business between these cities.
How do Colombo and Anchorage compare in size?
Colombo has a population of approximately 752,000 (metro: 5.6 million), while Anchorage has approximately 287,000 (metro: 398,000).
What are the major landmarks in Colombo and Anchorage?
Colombo is known for Galle Face Green, Gangaramaya Temple, Colombo Lotus Tower. Anchorage is famous for Anchorage Museum, Tony Knowles Coastal Trail, Flattop Mountain.
Do Colombo and Anchorage have stock exchanges?
Yes. Colombo has the CSE (Colombo Stock Exchange) and Anchorage has the N/A (Uses NYSE/NASDAQ). The -13h 30m time difference affects trading hour overlaps between these exchanges.
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 AKST timezone?
Major cities in the AKST timezone include Anchorage, Fairbanks, Juneau, Sitka, Wasilla.
What is the UTC offset for AKST?
Alaska Standard Time (AKST) is at UTC-09:00. During daylight saving time, it shifts to AKDT.
What should I know about the AKST timezone?
Alaska is the largest US state by area but has only about 730,000 residents. Anchorage is the most populous city in AKST with about 290,000 people.
When is it midnight in Colombo, what time is it in Anchorage?
When it is 12:00 AM (midnight) in Colombo (IST), it is -13h 30m later in Anchorage (AKST).
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