World Clock

There are 24 primary time zones, each roughly 15 degrees of longitude wide. However, about 40 distinct zones exist when including 30 or 45-minute offsets like India (UTC+5:30) and Nepal (UTC+5:45).

UTC (Coordinated Universal Time) is the primary time standard worldwide. Time zones are expressed as offsets from UTC. For example, New York is UTC-5 during standard time.

Aim for overlapping "awake hours" - typically between 8am and 10pm local time for both parties. For large differences (8+ hours), one person may need to call early morning or late evening.

DST shifts clocks forward in spring and back in fall. Not all countries observe it, and those that do may change on different dates - so the time difference between cities can vary by 1-2 hours throughout the year.

Yes. The times shown are always accurate to the current date, using the timezone database built into your browser.