What's the current time difference between IST and Surabaya?

Right now, Surabaya (Surabaya) is +1.5h relative to IST (IST · India Standard Time). The number is live and reflects the current daylight-saving status of both zones.

Does this converter account for daylight saving time?

Yes. The math is done against IANA's tz database via Intl.DateTimeFormat, so DST shifts in either zone show up immediately at the transition. Around DST boundaries the conversion can move by an hour from one week to the next — this page always reflects the current rule.

Why does the TO column sometimes show "+1d" or "−1d"?

When the IST hour lands on a different calendar day in Surabaya, we flag it so you don't accidentally schedule a meeting on the wrong date. IST 11 PM is often the next day in eastern-hemisphere zones, for example.

How do I schedule a meeting that works for both zones?

Look at the row highlighted lume green — that's the longest contiguous block where both IST and Surabaya are in standard working hours (9 AM–5 PM local). Open the planner from the link above to lock a specific time and share a DST-stable link with the other party.

IST to Surabaya

IST · India Standard Time ↔ Surabaya. Right now, Surabaya is +1.5h relative to IST. DST is honored live.

From

IST

—

Surabaya

—

00:00IST hour of day23:30

Live offset

+1.5h

IST (May 24) ↔ Surabaya (May 24)

If IST or Surabaya just shifted for daylight saving, that's already reflected.

Best meeting overlap

9:00 AM – 3:00 PM

IST time. Equivalent Surabaya: 10:30 AM – 4:30 PM

Working hours = 9 AM – 5 PM in each zone.

Hour-by-hour

IST → Surabaya, every hour

IST · May 24Surabaya · May 24

12:00 AM1:30 AM
1:00 AM2:30 AM
2:00 AM3:30 AM
3:00 AM4:30 AM
4:00 AM5:30 AM
5:00 AM6:30 AM
6:00 AM7:30 AM
7:00 AM8:30 AM
8:00 AM9:30 AM
9:00 AM10:30 AM
10:00 AM11:30 AM
11:00 AM12:30 PM
12:00 PM1:30 PM
1:00 PM2:30 PM
2:00 PM3:30 PM
3:00 PM4:30 PM
4:00 PM5:30 PM
5:00 PM6:30 PM
6:00 PM7:30 PM
7:00 PM8:30 PM
8:00 PM9:30 PM
9:00 PM10:30 PM
10:00 PM11:30 PM
11:00 PM+1d12:30 AM

Both zones in working hours±1d = the TO side lands on a different calendar day

FAQ

IST ↔ Surabaya, questions answered

What's the current time difference between IST and Surabaya?: Right now, Surabaya (Surabaya) is +1.5h relative to IST (IST · India Standard Time). The number is live and reflects the current daylight-saving status of both zones.
Does this converter account for daylight saving time?: Yes. The math is done against IANA's tz database via Intl.DateTimeFormat, so DST shifts in either zone show up immediately at the transition. Around DST boundaries the conversion can move by an hour from one week to the next — this page always reflects the current rule.
Why does the TO column sometimes show "+1d" or "−1d"?: When the IST hour lands on a different calendar day in Surabaya, we flag it so you don't accidentally schedule a meeting on the wrong date. IST 11 PM is often the next day in eastern-hemisphere zones, for example.
How do I schedule a meeting that works for both zones?: Look at the row highlighted lume green — that's the longest contiguous block where both IST and Surabaya are in standard working hours (9 AM–5 PM local). Open the planner from the link above to lock a specific time and share a DST-stable link with the other party.

Reverse — Surabaya to IST Time in Surabaya Open in planner