Surabaya to Kolkata Time Difference
🇮🇩 Surabaya is currently 1.5 hours behind of 🇮🇳 Kolkata.
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Atin 🇮🇩 Surabaya→it will be—in 🇮🇳 Kolkata
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Difference
-1.5h
Business overlap
8h
Distance
4,249 km
Approx. flight
5h
Hour-by-Hour: Surabaya to Kolkata
| 🇮🇩 Surabaya | 🇮🇳 Kolkata | Note |
|---|---|---|
| 12:00 AM | 10:30 PM(prev day) | Previous day |
| 1:00 AM | 11:30 PM(prev day) | Previous day |
| 2:00 AM | 12:30 AM | |
| 3:00 AM | 1:30 AM | |
| 4:00 AM | 2:30 AM | |
| 5:00 AM | 3:30 AM | |
| 6:00 AM | 4:30 AM | |
| 7:00 AM | 5:30 AM | |
| 8:00 AM | 6:30 AM | |
| 9:00 AM | 7:30 AM | |
| 10:00 AM | 8:30 AM | |
| 11:00 AM | 9:30 AM | |
| 12:00 PM | 10:30 AM | |
| 1:00 PM | 11:30 AM | |
| 2:00 PM | 12:30 PM | |
| 3:00 PM | 1:30 PM | |
| 4:00 PM | 2:30 PM | |
| 5:00 PM | 3:30 PM | |
| 6:00 PM | 4:30 PM | |
| 7:00 PM | 5:30 PM | |
| 8:00 PM | 6:30 PM | |
| 9:00 PM | 7:30 PM | |
| 10:00 PM | 8:30 PM | |
| 11:00 PM | 9:30 PM |
Daylight Saving Time (DST)
Neither Surabaya nor Kolkata observes Daylight Saving Time. The time difference is always 1.5 hours behind.
Best Meeting Times
There are 8 overlapping business hours between Surabaya and Kolkata (9 AM – 6 PM in each city).
🇮🇩 Surabaya
10:00 AM – 6:00 PM
🇮🇳 Kolkata
8:30 AM – 4:30 PM
Frequently Asked Questions
What is the time difference between Surabaya and Kolkata?
The time difference between Surabaya and Kolkata is currently 1.5 hours behind. Surabaya uses GMT+7 (UTC+7), while Kolkata uses GMT+5:30 (UTC+5:30).
When it's noon in Surabaya, what time is it in Kolkata?
When it's 12:00 PM (noon) in Surabaya, it is 10:30 AM in Kolkata. Use our calculator above to convert any other time.
Does the time difference between Surabaya and Kolkata change?
No. The time difference between Surabaya and Kolkata is always 1.5 hours behind — neither city observes Daylight Saving Time, so the offset never changes.
What are the best times to schedule a call between Surabaya and Kolkata?
The best time to call is between 10:00 AM and 6:00 PM in Surabaya (which is 8:30 AM – 4:30 PM in Kolkata). This 8-hour window falls within business hours in both cities.
Is Surabaya ahead or behind Kolkata?
Surabaya is currently 1.5 hours ahead of Kolkata.
What time zone is Surabaya in?
Surabaya is in the Asia/Jakarta time zone, currently using GMT+7 (UTC+7). Surabaya does not observe Daylight Saving Time.
What time is midnight in Surabaya in Kolkata?
When it is midnight (12:00 AM) in Surabaya, it is 10:30 PM in Kolkata.