EDT to Colombo
+9h 30mEDT
EDTSOURCEColombo
ISTGreen rows indicate typical business hours (9 AM - 5 PM)
EDT and IST on the World Map
The map below highlights the EDT (Eastern Daylight Time) and IST (India Standard Time) timezone regions across the globe.
EDT – Eastern Daylight Time
UTC-04:00Eastern Daylight Time (EDT) is the daylight saving time observed in the Eastern Time Zone, 4 hours behind UTC.
- •EDT is observed from the second Sunday of March to the first Sunday of November.
- •During EDT, the US East Coast is only 4 hours behind London (instead of 5).
- •Not all EST locations switch to EDT – Panama and Jamaica stay on EST year-round.
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.
Time Conversion Guide: EDT to Colombo
EDT runs on Eastern Daylight Time (EDT) at UTC-04:00. Colombo runs on India Standard Time (IST) at UTC+05:30. That puts EDT 9 hours 30 minutes ahead of Colombo — a difference of +9h 30m at the current offsets.
In practice, when it is 9:00 AM in EDT it is 6:30 PM in Colombo. Midnight in EDT is 9:30 AM in Colombo. Neither zone observes daylight saving time, so the offset between them stays constant all year.
EDT to Colombo time conversion table
| EDT (EDT) | Colombo (IST) | Day |
|---|---|---|
| 12:00 AM | 9:30 AM | same day |
| 6:00 AM | 3:30 PM | same day |
| 7:00 AM | 4:30 PM | same day |
| 8:00 AM | 5:30 PM | same day |
| 9:00 AM | 6:30 PM | same day |
| 12:00 PM | 9:30 PM | same day |
| 3:00 PM | 12:30 AM | next day |
| 5:00 PM | 2:30 AM | next day |
| 6:00 PM | 3:30 AM | next day |
| 9:00 PM | 6:30 AM | next day |
Why people convert EDT to Colombo time
- Scheduling a call from EDT to Colombo: a 10:00 AM start in EDT lands at 7:30 PM in Colombo, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +9h 30m gap: EDT and Colombo 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 Colombo is 6:30 PM in EDT.
- Keeping family and friends in sync: knowing that 8:00 PM in EDT is 5:30 AM in Colombo makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM EDT" is unambiguous; "3 PM" across a +9h 30m gap is not.
- With a +9h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week EDT takes the early slot, the next week Colombo does.
About EDT (Eastern Daylight Time)
Eastern Daylight Time (EDT) is used during the summer months (second Sunday of March to the first Sunday of November) in the Eastern Time Zone. During EDT, clocks are advanced by one hour to take advantage of longer daylight hours. Not all locations in the Eastern Time Zone observe DST – Panama, Jamaica, and most of the Caribbean remain on EST year-round.
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 EDT and Colombo
With a +9h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Colombo opens at 9:00 AM IST, which is 6:30 PM in EDT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
EDT and Colombo have no shared working hours because of the +9h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
EDT is 9 hours 30 minutes ahead of Colombo (EDT UTC-04:00 → IST UTC+05:30). 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
EDT
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
Clocks fall back on Sun, Nov 1, 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 EDT and Colombo?
EDT (EDT, UTC-04:00) is 9 hours 30 minutes ahead of Colombo (IST, UTC+05:30). The gap is currently +9h 30m.
How do I convert EDT time to Colombo time?
Add +9h 30m to EDT local time. For example, 9:00 AM in EDT is 6:30 PM 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 +9h 30m offset from EDT.
What is the best time to call Colombo from EDT?
There is no shared working-hours window because of the +9h 30m gap. The closest option is 1:00 PM in EDT, which is 10:30 PM in Colombo.
Which is ahead, EDT or Colombo?
EDT is 9 hours 30 minutes ahead of Colombo. When it is 12:00 PM in EDT it is 9:30 PM in Colombo.
Do EDT and Colombo use different time zones?
EDT uses EDT at UTC-04:00, while Colombo (Sri Lanka) uses IST at UTC+05:30. The IANA identifiers are America/New_York and Asia/Colombo.
Does daylight saving time affect the EDT–Colombo difference?
Neither zone observes daylight saving time, so the +9h 30m offset between EDT and Colombo is fixed all year.
Which other cities share EDT's time zone?
EDT also covers New York City, Washington D.C., Toronto, Miami, Philadelphia, Atlanta, Boston, Montreal.
Which countries use EDT, EDT's zone?
EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.
Is there a day difference between EDT and Colombo?
Not normally. The +9h 30m gap only pushes the date over for late-evening times.
What is the time difference between EDT and Colombo?
Colombo is +9h 30m from EDT.
What timezone is EDT in?
EDT 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 EDT (Eastern Daylight Time)?
EDT is used in United States (Eastern), Canada (Ontario, Quebec), Bahamas, Haiti, Turks and Caicos.
Does EDT observe daylight saving time?
Yes, EDT switches to EST during summer months.
What are some interesting facts about EDT?
EDT is observed from the second Sunday of March to the first Sunday of November. During EDT, the US East Coast is only 4 hours behind London (instead of 5).
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 EDT, what time is it in Colombo?
When it is 12:00 AM (midnight) in EDT (EDT), it is +9h 30m later in Colombo (IST).
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