Offset
The time difference between Chicago and Surabaya is 12 hours.
Chicago (CDT) is behind Surabaya (WIB).
CDT: UTC-5
WIB: UTC+7
Chicago is currently observing daylight saving time; Surabaya is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Chicago and Surabaya don't overlap on the same weekday. Surabaya is 12 hours ahead of Chicago.
With some flexibility, there are two workable windows outside standard hours, depending on which side takes the early or late slot:
- 7 AM–8 AM in Chicago (7 PM–8 PM in Surabaya) — suggest 7:00 AM Chicago (7:00 PM Surabaya).
- 7 PM–8 PM in Chicago (7 AM–8 AM the next day in Surabaya) — suggest 7:00 PM Chicago (7:00 AM Surabaya).
Either is an early start or late finish for one side, but workable for a one-off meeting.
This window may shift by an hour during daylight saving time.
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.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
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
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Chicago | Surabaya | Day |
|---|---|---|
| 12:00 am | 12:00 pm | Same day |
| 1:00 am | 1:00 pm | Same day |
| 2:00 am | 2:00 pm | Same day |
| 3:00 am | 3:00 pm | Same day |
| 4:00 am | 4:00 pm | Same day |
| 5:00 am | 5:00 pm | Same day |
| 6:00 am | 6:00 pm | Same day |
| 7:00 am | 7:00 pm | Same day |
| 8:00 am | 8:00 pm | Same day |
| 9:00 am | 9:00 pm | Same day |
| 10:00 am | 10:00 pm | Same day |
| 11:00 am | 11:00 pm | Same day |
| 12:00 pm | 12:00 am | +1 day |
| 1:00 pm | 1:00 am | +1 day |
| 2:00 pm | 2:00 am | +1 day |
| 3:00 pm | 3:00 am | +1 day |
| 4:00 pm | 4:00 am | +1 day |
| 5:00 pm | 5:00 am | +1 day |
| 6:00 pm | 6:00 am | +1 day |
| 7:00 pm | 7:00 am | +1 day |
| 8:00 pm | 8:00 am | +1 day |
| 9:00 pm | 9:00 am | +1 day |
| 10:00 pm | 10:00 am | +1 day |
| 11:00 pm | 11:00 am | +1 day |
Daylight saving time
Chicago observes daylight saving time; Surabaya does not. The offset between the two zones changes when Chicago transitions: on Sunday, November 1, 2026, clocks fall back from CDT to CST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:17 AM
- Sunset
- 8:24 PM
- Day length
- 15h 7m
- Sunrise
- 5:37 AM
- Sunset
- 5:20 PM
- Day length
- 11h 43m
Daylight overlap: 2h 46m — 5:37 PM–8:24 PM in Chicago (5:37 AM–8:24 AM in Surabaya). Both locations are in daylight during this window.
Cities in these zones
Other cities in Central Time
Other cities in Western Indonesia Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Central Time
- GYY
- MDW
- ORD
- HOU
- IAH
- SAT
- DAL
- DFW
- AUS
- BNA
Airports in Western Indonesia Time
- CGK
- HLP
- SUB
- BDO
- KNO
- PLM
- SRG
Related conversions
Common conversions
- What is 9:00 am Chicago in Surabaya?
- 9:00 am Chicago is 9:00 pm Surabaya.
- What is 12:00 pm Chicago in Surabaya?
- 12:00 pm Chicago is 12:00 am Surabaya, the next day.
- What is 12:30 pm Chicago in Surabaya?
- 12:30 pm Chicago is 12:30 am Surabaya, the next day.
- What is 2:00 pm Chicago in Surabaya?
- 2:00 pm Chicago is 2:00 am Surabaya, the next day.
- What is 5:00 pm Chicago in Surabaya?
- 5:00 pm Chicago is 5:00 am Surabaya, the next day.
- What is 11:30 pm Chicago in Surabaya?
- 11:30 pm Chicago is 11:30 am Surabaya, the next day.