Best overlap: 8:30 AM to 1:30 PM in Kolkata is 1:00 PM to 6:00 PM in Sydney.
For a call that suits both sides, look at 8:30 AM to 1:30 PM in Kolkata / 1:00 PM to 6:00 PM in Sydney. With 5 hours of overlap, 8:30 AM in Kolkata (1:00 PM in Sydney) is a comfortable, repeatable slot for both sides. Because Sydney and Kolkata don't both observe daylight saving, plan to re-check the overlap around March and November.
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Kolkata Asia/Kolkata | ||||||||||||||||||||||||
Sydney Australia/Sydney |
One in San Francisco, one in London, one in Sydney. Many of the best startups are built this way, and many fail because of it. A practical playbook for co-founder relationships across time zones in the first three years. -
8 AM Tokyo is 4 PM in Los Angeles the day before. West Coast afternoon windows, the East Coast dead zone, and why the Philippines slot is an hour off. -
Long-distance relationships, parents working overseas, grandkids in Auckland and grandparents in London. The work guides do not really apply. Here is a practical playbook for keeping family relationships strong across time zones. -