Kathmandu to Sri Lanka
-0h 15mKathmandu
NPTSOURCESri Lanka
ISTGreen rows indicate typical business hours (9 AM - 5 PM)
NPT and IST on the World Map
The map below highlights the NPT (Nepal Time) and IST (India Standard Time) timezone regions across the globe.
NPT – Nepal Time
UTC+05:45Nepal Time (NPT, UTC+05:45) is the time zone for Nepal — one of the few offsets in the world set on a 45-minute increment.
- •Nepal Time is UTC+05:45 — a 45-minute offset, not a whole or half hour.
- •The 45-minute offset was adopted in 1986 to match Kathmandu's solar time.
- •Nepal does not observe daylight saving time.
- •Nepal is 15 minutes ahead of India, despite sharing a long open border.
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 Kathmandu
WikipediaKathmandu operates on Nepal Time (NPT), one of the world's unique UTC+5:45 timezones. This 15-minute offset from India makes Nepal time distinctive for global coordination.
Nepal Time (NPT) is one of only three timezones offset by 45 minutes (UTC+5:45).
Comparing Time Zones: Kathmandu and Sri Lanka
Kathmandu runs on Nepal Time (NPT) at UTC+05:45. Sri Lanka runs on India Standard Time (IST) at UTC+05:30. That puts Kathmandu 15 minutes behind Sri Lanka — a difference of -0h 15m at the current offsets.
In practice, when it is 9:00 AM in Kathmandu it is 8:45 AM in Sri Lanka. Midnight in Kathmandu is 11:45 PM in Sri Lanka. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Kathmandu to Sri Lanka time conversion table
| Kathmandu (NPT) | Sri Lanka (IST) | Day |
|---|---|---|
| 12:00 AM | 11:45 PM | previous day |
| 6:00 AM | 5:45 AM | same day |
| 7:00 AM | 6:45 AM | same day |
| 8:00 AM | 7:45 AM | same day |
| 9:00 AM | 8:45 AM | same day |
| 12:00 PM | 11:45 AM | same day |
| 3:00 PM | 2:45 PM | same day |
| 5:00 PM | 4:45 PM | same day |
| 6:00 PM | 5:45 PM | same day |
| 9:00 PM | 8:45 PM | same day |
Why people convert Kathmandu to Sri Lanka time
- Scheduling a call from Kathmandu to Sri Lanka: a 10:00 AM start in Kathmandu lands at 9:45 AM in Sri Lanka, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Kathmandu and Sri Lanka are inside the 9-to-5 working day between 9:15 AM and 5:00 PM NPT time (9:00 AM–4:45 PM IST). That is roughly 7 hours 45 minutes of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in Kathmandu is 7:45 PM in Sri Lanka makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM NPT" is unambiguous; "3 PM" across a -0h 15m gap is not.
- Block 9:15 AM–5:00 PM NPT as the recurring meeting window if you work primarily from Kathmandu and need Sri Lanka colleagues present.
About NPT (Nepal Time)
Nepal Time (NPT) runs at UTC+05:45, one of only a handful of time zones worldwide that are not a whole or half hour from UTC. Nepal set its offset to 5 hours 45 minutes ahead of UTC in 1986 to mark the country's position between the 75°E and 90°E meridians; Kathmandu's solar time sits just over 5 hours 41 minutes ahead of Greenwich, so the 45-minute offset tracks the sun more closely than either 5:30 or 6:00 would. Nepal does not observe daylight saving time, so NPT is fixed all year. The offset makes Nepal 15 minutes ahead of India Standard Time (UTC+05:30) and 2 hours 15 minutes ahead of Dubai (UTC+04:00).
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 Kathmandu and Sri Lanka
Both Kathmandu and Sri Lanka sit inside the 9 AM – 5 PM working day between 9:15 AM–5:00 PM NPT, which is 9:00 AM–4:45 PM IST. That gives roughly 7 hours and 45 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Kathmandu and Sri Lanka share 7 hours of working-hours overlap (9:15 AM–5:00 PM NPT), so scheduling a live meeting is straightforward.
Kathmandu is 15 minutes behind Sri Lanka (NPT UTC+05:45 → IST UTC+05:30). The shared working window is 9:15 AM–5:00 PM NPT. Remember to re-check around daylight-saving transitions.
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 Kathmandu and Sri Lanka?
Kathmandu (NPT, UTC+05:45) is 15 minutes behind Sri Lanka (IST, UTC+05:30). The gap is currently -0h 15m.
How do I convert Kathmandu time to Sri Lanka time?
Add -0h 15m to Kathmandu local time. For example, 9:00 AM in Kathmandu is 8:45 AM in Sri Lanka.
What time is it in Sri Lanka right now?
Sri Lanka 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 -0h 15m offset from Kathmandu.
What is the best time to call Sri Lanka from Kathmandu?
Call between 9:15 AM and 5:00 PM NPT — that maps to 9:00 AM–4:45 PM IST and keeps both parties inside the working day.
Which is behind, Kathmandu or Sri Lanka?
Kathmandu is 15 minutes behind Sri Lanka. When it is 12:00 PM in Kathmandu it is 11:45 AM in Sri Lanka.
Do Kathmandu and Sri Lanka use different time zones?
Kathmandu (Nepal) uses NPT at UTC+05:45, while Sri Lanka (Sri Lanka) uses IST at UTC+05:30. The IANA identifiers are Asia/Kathmandu and Asia/Colombo.
Does daylight saving time affect the Kathmandu–Sri Lanka difference?
Neither zone observes daylight saving time, so the -0h 15m offset between Kathmandu and Sri Lanka is fixed all year.
Which other cities share Kathmandu's time zone?
NPT also covers Kathmandu, Pokhara, Lalitpur, Bharatpur, Biratnagar.
Which countries use NPT, Kathmandu's zone?
NPT is used in Nepal.
Is there a day difference between Kathmandu and Sri Lanka?
Not normally. The -0h 15m gap only pushes the date over the previous day.
What is the time difference between Kathmandu and Sri Lanka?
Sri Lanka is -0h 15m from Kathmandu.
What timezone is Kathmandu in?
Kathmandu operates on Nepal Time (NPT), one of the world's unique UTC+5:45 timezones. This 15-minute offset from India makes Nepal time distinctive for global coordination.
What timezone is Sri Lanka in?
Sri Lanka operates on its local timezone.
What are the business hours in Kathmandu?
Standard business hours in Kathmandu are 10:00 AM - 5:00 PM NPT.
Which countries use NPT (Nepal Time)?
NPT is used in Nepal.
Does NPT observe daylight saving time?
No, NPT does not observe daylight saving time and remains at UTC+05:45 year-round.
What are some interesting facts about NPT?
Nepal Time is UTC+05:45 — a 45-minute offset, not a whole or half hour. The 45-minute offset was adopted in 1986 to match Kathmandu's solar time.
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 Kathmandu, what time is it in Sri Lanka?
When it is 12:00 AM (midnight) in Kathmandu (NPT), it is -0h 15m later in Sri Lanka (IST).
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