From
Surabaya
Indonesia
12:07 PM
Sun, Nov 1
UTC+7Asia/Jakarta
Time Difference
Surabaya vs Lanzhou Time Difference
Compare the current local time in Surabaya, Indonesia and Lanzhou, China.
Live local timeDST awareUTC offsets
Current difference
Lanzhou is currently 1 hour ahead of Surabaya.
This difference is calculated using the current UTC offsets for both locations and automatically reflects daylight-saving changes.
24-hour comparison
Compare Surabaya and Lanzhou hour by hour
See how a full local day in Surabaya, Indonesia maps to Lanzhou, China. TimeInOne automatically accounts for timezone offsets, date changes and daylight-saving transitions.
Best working-hours overlap
9:00 AM – 5:00 PM in Surabaya
corresponds to 10:00 AM – 6:00 PM in Lanzhou.
Surabaya
Asia/Jakarta
Lanzhou
Asia/Shanghai
Availability
12:00 AM
Sun, Nov 1
1:00 AM
Sun, Nov 1
Night
1:00 AM
Sun, Nov 1
2:00 AM
Sun, Nov 1
Night
2:00 AM
Sun, Nov 1
3:00 AM
Sun, Nov 1
Night
3:00 AM
Sun, Nov 1
4:00 AM
Sun, Nov 1
Night
4:00 AM
Sun, Nov 1
5:00 AM
Sun, Nov 1
Night
5:00 AM
Sun, Nov 1
6:00 AM
Sun, Nov 1
Night
6:00 AM
Sun, Nov 1
7:00 AM
Sun, Nov 1
Night
7:00 AM
Sun, Nov 1
8:00 AM
Sun, Nov 1
Possible
8:00 AM
Sun, Nov 1
9:00 AM
Sun, Nov 1
Possible
9:00 AM
Sun, Nov 1
10:00 AM
Sun, Nov 1
Good overlap
10:00 AM
Sun, Nov 1
11:00 AM
Sun, Nov 1
Good overlap
11:00 AM
Sun, Nov 1
12:00 PM
Sun, Nov 1
Good overlap
12:00 PM
Sun, Nov 1
1:00 PM
Sun, Nov 1
Good overlap
1:00 PM
Sun, Nov 1
2:00 PM
Sun, Nov 1
Good overlap
2:00 PM
Sun, Nov 1
3:00 PM
Sun, Nov 1
Good overlap
3:00 PM
Sun, Nov 1
4:00 PM
Sun, Nov 1
Good overlap
4:00 PM
Sun, Nov 1
5:00 PM
Sun, Nov 1
Good overlap
5:00 PM
Sun, Nov 1
6:00 PM
Sun, Nov 1
Possible
6:00 PM
Sun, Nov 1
7:00 PM
Sun, Nov 1
Possible
7:00 PM
Sun, Nov 1
8:00 PM
Sun, Nov 1
Possible
8:00 PM
Sun, Nov 1
9:00 PM
Sun, Nov 1
Night
9:00 PM
Sun, Nov 1
10:00 PM
Sun, Nov 1
Night
10:00 PM
Sun, Nov 1
11:00 PM
Sun, Nov 1
Night
11:00 PM
Sun, Nov 1
12:00 AM
Next dayMon, Nov 2
Night
Working-hour labels use a general 9:00 AM–6:00 PM schedule. Individual schedules may differ.
On daylight-saving transition dates, a local day can contain 23 or 25 real hours instead of 24.
Call planning
Best time to call Lanzhou from Surabaya
Compare typical business hours in Surabaya, Indonesia and Lanzhou, China to find a practical time for calls, meetings or international coordination.
Surabaya
12:07 PM – 5:07 PM
Indonesia
Best overlap
Lanzhou
1:07 PM – 6:07 PM
China
The best time to call Lanzhou from Surabaya is between 12:07 PM and 5:07 PM in Surabaya. This corresponds to 1:07 PM – 6:07 PM in Lanzhou.
Other reasonable windows
Surabaya
5:07 PM – 8:07 PM
Lanzhou
6:07 PM – 9:07 PM
Recommendations use typical 9:00 AM–6:00 PM business hours and a broader 7:00 AM–9:00 PM acceptable calling window. Individual schedules may differ.
Time difference explained
Surabaya and Lanzhou time difference explained
Current local-time relationship
Lanzhou is currently 1 hour ahead of Surabaya.
Surabaya uses Asia/Jakarta and currently has an offset of UTC+7. Lanzhou uses Asia/Shanghai and currently has an offset of UTC+8.
Working-hours overlap
For a typical 9:00 AM–6:00 PM workday, the cities overlap from 9:00 AM to 5:00 PM in Surabaya, corresponding to 10:00 AM–6:00 PM in Lanzhou.
Because UTC offsets can change during the year, always check the selected date when planning an important international call or meeting.
Convert a specific time
Need more than the current difference?
Convert a specific date and local time between Surabaya and Lanzhou.
Open time converterLocal clocks
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FAQ
Surabaya to Lanzhou time difference FAQ
Common questions about the current time difference, UTC offsets, daylight-saving changes and practical calling hours between Surabaya and Lanzhou.
What is the time difference between Surabaya and Lanzhou?
The current time difference between Surabaya and Lanzhou is 1 hour. Lanzhou is currently 1 hour ahead of Surabaya.
Is Lanzhou ahead of or behind Surabaya?
Lanzhou is currently 1 hour ahead of Surabaya.
What time is it in Lanzhou when it is 9:00 AM in Surabaya?
Using the current UTC offsets, 9:00 AM in Surabaya corresponds to 10:00 AM in Lanzhou. The exact difference can change when daylight-saving rules change.
What is the best time to call Lanzhou from Surabaya?
Typical 9:00 AM–6:00 PM business hours overlap between 9:00 AM and 5:00 PM in Surabaya. This corresponds to 10:00 AM–6:00 PM in Lanzhou.
Can the time difference between Surabaya and Lanzhou change?
Yes. The time difference can change if Surabaya or Lanzhou changes its UTC offset because of daylight-saving or other local time-zone rules. TimeInOne uses the IANA zones Asia/Jakarta and Asia/Shanghai for date-aware calculations.