Colombo to PDT
-12h 30mColombo
ISTSOURCEPDT
PDTGreen rows indicate typical business hours (9 AM - 5 PM)
IST and PDT on the World Map
The map below highlights the IST (India Standard Time) and PDT (Pacific 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.
PDT – Pacific Daylight Time
UTC-07:00Pacific Daylight Time (PDT) is the daylight saving offset on the US/Canada Pacific coast, 7 hours behind UTC.
- •PDT aligns with MST at UTC-07:00.
- •Tech company earnings calls often reference PDT/PST times.
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.
Everything You Need to Know About Colombo and PDT Time
Colombo runs on India Standard Time (IST) at UTC+05:30. PDT runs on Pacific Daylight Time (PDT) at UTC-07:00. That puts Colombo 12 hours 30 minutes behind PDT — a difference of -12h 30m at the current offsets.
In practice, when it is 9:00 AM in Colombo it is 8:30 PM in PDT on the previous day. Midnight in Colombo is 11:30 AM in PDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Colombo to PDT time conversion table
| Colombo (IST) | PDT (PDT) | Day |
|---|---|---|
| 12:00 AM | 11:30 AM | previous day |
| 6:00 AM | 5:30 PM | previous day |
| 7:00 AM | 6:30 PM | previous day |
| 8:00 AM | 7:30 PM | previous day |
| 9:00 AM | 8:30 PM | previous day |
| 12:00 PM | 11:30 PM | previous day |
| 3:00 PM | 2:30 AM | same day |
| 5:00 PM | 4:30 AM | same day |
| 6:00 PM | 5:30 AM | same day |
| 9:00 PM | 8:30 AM | same day |
Why people convert Colombo to PDT time
- Scheduling a call from Colombo to PDT: a 10:00 AM start in Colombo lands at 9:30 PM in PDT the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -12h 30m gap: Colombo and PDT 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 PDT is 8:30 PM in Colombo.
- Keeping family and friends in sync: knowing that 8:00 PM in Colombo is 7:30 AM in PDT makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a -12h 30m gap is not.
- With a -12h 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 PDT does.
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 PDT (Pacific Daylight Time)
Pacific Daylight Time (PDT) is observed from March to November on the Pacific coast. During PDT, the west coast is 7 hours behind UTC and only 2 hours behind the east coast's EDT.
Best time to call between Colombo and PDT
With a -12h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. PDT opens at 9:00 AM PDT, which is 8:30 PM in Colombo, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Colombo and PDT have no shared working hours because of the -12h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
Colombo is 12 hours 30 minutes behind PDT (IST UTC+05:30 → PDT UTC-07:00). 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
PDT
☀ Currently in DST
Standard: UTC-08:00 · DST: UTC-07:00
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 PDT?
Colombo (IST, UTC+05:30) is 12 hours 30 minutes behind PDT (PDT, UTC-07:00). The gap is currently -12h 30m.
How do I convert Colombo time to PDT time?
Add -12h 30m to Colombo local time. For example, 9:00 AM in Colombo is 8:30 PM in PDT (previous day).
What time is it in PDT right now?
PDT uses PDT at UTC-07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -12h 30m offset from Colombo.
What is the best time to call PDT from Colombo?
There is no shared working-hours window because of the -12h 30m gap. The closest option is 1:00 PM in Colombo, which is 12:30 AM in PDT.
Which is behind, Colombo or PDT?
Colombo is 12 hours 30 minutes behind PDT. When it is 12:00 PM in Colombo it is 11:30 PM in PDT.
Do Colombo and PDT use different time zones?
Colombo (Sri Lanka) uses IST at UTC+05:30, while PDT uses PDT at UTC-07:00. The IANA identifiers are Asia/Colombo and America/Los_Angeles.
Does daylight saving time affect the Colombo–PDT difference?
Neither zone observes daylight saving time, so the -12h 30m offset between Colombo and PDT 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 PDT?
Sometimes. The -12h 30m gap is large enough that 8:00 PM or later in Colombo already falls on the in PDT.
What is the time difference between Colombo and PDT?
PDT is -12h 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 PDT in?
PDT 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 PDT timezone?
Major cities in the PDT timezone include Los Angeles, San Francisco, Seattle, Vancouver, Portland.
What is the UTC offset for PDT?
Pacific Daylight Time (PDT) is at UTC-07:00. During daylight saving time, it shifts to PST.
What should I know about the PDT timezone?
PDT aligns with MST at UTC-07:00. Tech company earnings calls often reference PDT/PST times.
When is it midnight in Colombo, what time is it in PDT?
When it is 12:00 AM (midnight) in Colombo (IST), it is -12h 30m later in PDT (PDT).
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