Best overlap: 3:00 PM to 6:00 PM in Auckland is 8:30 AM to 11:30 AM in Colombo.
3:00 PM to 6:00 PM in Auckland is when Colombo is also working, at 8:30 AM to 11:30 AM their time. You've got a decent 3-hour window. Set a recurring time near 3:00 PM in Auckland (8:30 AM in Colombo) and stick to it. Heads up: because Auckland changes its clocks and Colombo doesn't, the difference moves by an hour twice a year. Confirm the overlap around the DST switch.
| Local time | 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Auckland Pacific/Auckland | ||||||||||||||||||||||||
Colombo Asia/Colombo |
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