World Clock

The world is divided into 24 primary time zones, but the actual number is closer to 37 when accounting for 30-minute and 45-minute offsets. India uses UTC+5:30, Nepal uses UTC+5:45, and the Chatham Islands in New Zealand use UTC+12:45. Iran operates on UTC+3:30, and Afghanistan on UTC+4:30. Daylight Saving Time (DST) complicates matters further — the US springs forward in March, while Europe does so in late March, creating a period where the US-Europe time difference is temporarily 1 hour less than usual. Australia's DST runs from October to April (Southern Hemisphere), meaning Australia-US time differences change four times per year. Not all regions observe DST: Arizona (except Navajo Nation), Hawaii, most of Saskatchewan, and the entire tropics stay on standard time year-round. This world clock displays current times across multiple zones simultaneously, automatically handling DST transitions. Perfect for remote teams, international business, and anyone coordinating across borders — all running locally on your device using your system clock.

Finding a meeting time that works across three or more time zones requires understanding overlap windows. A team spanning New York (EST/UTC-5), London (GMT/UTC+0), and Tokyo (JST/UTC+9) has a challenging 14-hour spread. The only reasonable overlap is 9-10 PM Tokyo / 12-1 PM London / 7-8 AM New York. Adding Sydney (AEST/UTC+11) makes it nearly impossible without someone attending at an unreasonable hour. Common strategies include rotating meeting times so no single timezone always bears the inconvenience, recording meetings for asynchronous viewing, and using overlapping pairs (US meets Europe in morning, Europe meets Asia in afternoon). When sending calendar invitations, always specify the time zone — "3 PM EST" is unambiguous, while "3 PM" leaves room for confusion. ISO 8601 format (2024-03-15T15:00:00-05:00) is the most precise. For email communication, mentioning two time zones helps: "Let's aim for 2 PM ET / 7 PM GMT." This clock helps identify feasible overlap windows instantly.