NST to Colombo
+9hNST
NSTSOURCEColombo
ISTGreen rows indicate typical business hours (9 AM - 5 PM)
NST and IST on the World Map
The map below highlights the NST (Newfoundland Standard Time) and IST (India Standard Time) timezone regions across the globe.
NST – Newfoundland Standard Time
UTC-03:30Newfoundland Standard Time (NST) is a unique half-hour offset time zone in Canada, 3.5 hours behind UTC.
- •NST is one of only a few half-hour offset time zones in the world.
- •Newfoundland joined Canada in 1949 and kept its unique time zone.
- •St. John's is the easternmost city in North America.
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.
Understanding the +9h Gap: NST vs Colombo
NST runs on Newfoundland Standard Time (NST) at UTC-03:30. Colombo runs on India Standard Time (IST) at UTC+05:30. That puts NST 9 hours ahead of Colombo — a difference of +9h at the current offsets.
In practice, when it is 9:00 AM in NST it is 6:00 PM in Colombo. Midnight in NST is 9:00 AM in Colombo. Neither zone observes daylight saving time, so the offset between them stays constant all year.
NST to Colombo time conversion table
| NST (NST) | Colombo (IST) | Day |
|---|---|---|
| 12:00 AM | 9:00 AM | same day |
| 6:00 AM | 3:00 PM | same day |
| 7:00 AM | 4:00 PM | same day |
| 8:00 AM | 5:00 PM | same day |
| 9:00 AM | 6:00 PM | same day |
| 12:00 PM | 9:00 PM | same day |
| 3:00 PM | 12:00 AM | next day |
| 5:00 PM | 2:00 AM | next day |
| 6:00 PM | 3:00 AM | next day |
| 9:00 PM | 6:00 AM | next day |
Why people convert NST to Colombo time
- Scheduling a call from NST to Colombo: a 10:00 AM start in NST lands at 7:00 PM in Colombo, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +9h gap: NST 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 6:00 PM in NST.
- Watching a live event or market open: NST viewers need 6:00 PM in Colombo to catch a 9:00 AM start there, and 3:00 PM if the event is anchored to NST.
- Always state the zone abbreviation, not just the hour. "3:00 PM NST" is unambiguous; "3 PM" across a +9h gap is not.
- With a +9h gap there is no shared 9-to-5 window, so alternate the early start: one week NST takes the early slot, the next week Colombo does.
About NST (Newfoundland Standard Time)
Newfoundland Standard Time (NST) is one of the few half-hour offset time zones in the world. It covers the island of Newfoundland in Canada and is 30 minutes ahead of Atlantic Standard Time. This unique offset exists because Newfoundland was an independent country until 1949.
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 NST and Colombo
With a +9h offset there is no overlap inside a normal 9 AM – 5 PM day. Colombo opens at 9:00 AM IST, which is 6:00 PM in NST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
NST and Colombo have no shared working hours because of the +9h gap. Teams need to alternate early starts or rely on asynchronous handovers.
NST is 9 hours ahead of Colombo (NST UTC-03:30 → 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
NST
☀ Currently in DST
Standard: UTC-03:30 · DST: UTC-02:30
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 NST and Colombo?
NST (NST, UTC-03:30) is 9 hours ahead of Colombo (IST, UTC+05:30). The gap is currently +9h.
How do I convert NST time to Colombo time?
Add +9h to NST local time. For example, 9:00 AM in NST is 6:00 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 offset from NST.
What is the best time to call Colombo from NST?
There is no shared working-hours window because of the +9h gap. The closest option is 1:00 PM in NST, which is 10:00 PM in Colombo.
Which is ahead, NST or Colombo?
NST is 9 hours ahead of Colombo. When it is 12:00 PM in NST it is 9:00 PM in Colombo.
Do NST and Colombo use different time zones?
NST uses NST at UTC-03:30, while Colombo (Sri Lanka) uses IST at UTC+05:30. The IANA identifiers are America/St_Johns and Asia/Colombo.
Does daylight saving time affect the NST–Colombo difference?
Neither zone observes daylight saving time, so the +9h offset between NST and Colombo is fixed all year.
Which other cities share NST's time zone?
NST also covers St. John's, Corner Brook, Mount Pearl.
Which countries use NST, NST's zone?
NST is used in Canada (Newfoundland).
Is there a day difference between NST and Colombo?
Not normally. The +9h gap only pushes the date over for late-evening times.
What is the time difference between NST and Colombo?
Colombo is +9h from NST.
What timezone is NST in?
NST 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 NST (Newfoundland Standard Time)?
NST is used in Canada (Newfoundland).
Does NST observe daylight saving time?
Yes, NST switches to NDT during summer months.
What are some interesting facts about NST?
NST is one of only a few half-hour offset time zones in the world. Newfoundland joined Canada in 1949 and kept its unique time zone.
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 NST, what time is it in Colombo?
When it is 12:00 AM (midnight) in NST (NST), it is +9h later in Colombo (IST).
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