The hours you are both awake, a good time to ring, and how the gap moves through the year. Worked out from the time-zone database.
Right now
Choose both places to see the hours.
Waking hours
We assume people are up from 7:00 to 22:00, and that 9:00 to 21:00 is a fair time for a call. Change it if they keep other hours.
Through the year
We assume you are up from 7:00 to 22:00 and that 9:00 to 21:00 is a fair time for them to take a call. Change the hours in the tool above if they keep others.
14 November 2026 to 4 April 2027
Jakarta is 4 hours behind Sydney.
Good time to ring: 13:00 to 22:00, your time (9:00 to 18:00 in Jakarta).
4 April 2027 to 3 October 2027
Jakarta is 3 hours behind Sydney.
Good time to ring: 12:00 to 22:00, your time (9:00 to 19:00 in Jakarta).
3 October 2027 to 31 December 2027
Jakarta is 4 hours behind Sydney.
Good time to ring: 13:00 to 22:00, your time (9:00 to 18:00 in Jakarta).
When the clocks change
Sydney: clocks go back 1 hour on Sunday 4 April 2027, at 3:00 local time.
Sydney: clocks go forward 1 hour on Sunday 3 October 2027, at 2:00 local time.
Jakarta does not change its clocks in this period.
Jakarta last changed its clocks on 1 January 1964.
Time zones: Sydney uses Australia/Sydney and Jakarta uses Asia/Jakarta in the IANA time-zone database, version 2026f. Dates are worked out from it; a government can change its clocks at short notice.
