World Timezones

Istanbul to Surabaya Converter

Compare Surabaya to Istanbul instead
Istanbul2:13 pmWed, Jun 10
IstanbulTRT
Turkey · UTC+3
2:13 pmWed, Jun 10
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
SurabayaWIB
Indonesia · UTC+7
6:13 pmWed, Jun 10
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a
3a

Offset

The time difference between Istanbul and Surabaya is 4 hours.

4 hours

Istanbul (TRT) is behind Surabaya (WIB).

TRT: UTC+3

WIB: UTC+7

Neither Istanbul nor Surabaya is currently observing daylight saving time.

When to schedule

Business-hours overlap: 9 AM–1 PM in Istanbul (1 PM–5 PM in Surabaya).

Both teams are in working hours during this window on weekdays.

Suggested time: 11:00 AM Istanbul (3:00 PM Surabaya).

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

Turkey

  • New Year's DayThu, Jan 1
  • National Independence & Children's DayThu, Apr 23
  • Labour DayFri, May 1
  • Atatürk Commemoration & Youth DayTue, May 19
  • Democracy and National Unity DayWed, Jul 15
  • Victory DaySun, Aug 30
  • Republic DayThu, Oct 29

Indonesia

  • New Year's DayThu, Jan 1
  • Good FridayFri, Apr 3
  • Easter SundaySun, Apr 5
  • Labour DayFri, May 1
  • Ascension DayThu, May 14
  • Pancasila DayMon, Jun 1
  • Independence DayMon, Aug 17
  • Christmas DayFri, Dec 25

About these zones

Istanbul uses Turkey Time (TRT). To call Turkey, dial +90.

Surabaya uses Western Indonesia Time (WIB). To call Indonesia, dial +62.

Surabaya is approximately 6,250 miles east of Istanbul.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

IstanbulSurabayaDay
12:00 am4:00 amSame day
1:00 am5:00 amSame day
2:00 am6:00 amSame day
3:00 am7:00 amSame day
4:00 am8:00 amSame day
5:00 am9:00 amSame day
6:00 am10:00 amSame day
7:00 am11:00 amSame day
8:00 am12:00 pmSame day
9:00 am1:00 pmSame day
10:00 am2:00 pmSame day
11:00 am3:00 pmSame day
12:00 pm4:00 pmSame day
1:00 pm5:00 pmSame day
2:00 pm6:00 pmSame day
3:00 pm7:00 pmSame day
4:00 pm8:00 pmSame day
5:00 pm9:00 pmSame day
6:00 pm10:00 pmSame day
7:00 pm11:00 pmSame day
8:00 pm12:00 am+1 day
9:00 pm1:00 am+1 day
10:00 pm2:00 am+1 day
11:00 pm3:00 am+1 day

Daylight saving time

Neither Istanbul nor Surabaya observes daylight saving time. The offset between these zones remains constant year-round.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Istanbul
Sunrise
5:33 AM
Sunset
8:36 PM
Day length
15h 4m
Surabaya
Sunrise
5:38 AM
Sunset
5:21 PM
Day length
11h 43m

Daylight overlap: 7h 48m — 5:33 AM–1:21 PM in Istanbul (9:33 AM–5:21 PM in Surabaya). Both locations are in daylight during this window.

Cities in these zones

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Turkey Time

  • IST
  • SAW
  • ESB
  • YEI
  • ADB
  • GZT
  • DIY
  • ADA
  • COV
  • ASR

Airports in Western Indonesia Time

  • CGK
  • HLP
  • SUB
  • BDO
  • KNO
  • PLM
  • SRG

Related conversions

Common conversions

What is 9:00 am Istanbul in Surabaya?
9:00 am Istanbul is 1:00 pm Surabaya.
What is 12:00 pm Istanbul in Surabaya?
12:00 pm Istanbul is 4:00 pm Surabaya.
What is 12:30 pm Istanbul in Surabaya?
12:30 pm Istanbul is 4:30 pm Surabaya.
What is 2:00 pm Istanbul in Surabaya?
2:00 pm Istanbul is 6:00 pm Surabaya.
What is 5:00 pm Istanbul in Surabaya?
5:00 pm Istanbul is 9:00 pm Surabaya.
What is 11:30 pm Istanbul in Surabaya?
11:30 pm Istanbul is 3:30 am Surabaya, the next day.