Free Time Zone Converter — World Clock & Meeting Planner

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. It replaced GMT in 1972. All time zones are expressed as positive or negative offsets from UTC — New York is UTC-5 (UTC-4 during DST), Tokyo is UTC+9. UTC never changes for Daylight Saving Time, making it a stable reference point for global coordination.

Daylight Saving Time advances clocks by one hour during warmer months to extend evening daylight. The US observes DST from the second Sunday in March to the first Sunday in November. Most of Europe follows from the last Sunday in March to the last Sunday in October. Many countries do not observe DST at all, including China, Japan, India, most of Africa and parts of South America. Our converter is DST-aware and automatically applies the correct offset for any selected date.

Use the Meeting Planner feature. Add multiple cities from your team's locations and the tool highlights hours that fall within business hours (9am–6pm) for the most cities simultaneously. The most common overlap for US + Europe is 9am–12pm ET. For US + Asia there is rarely any daytime overlap.

A UTC offset is a simple number (like +5:30 or -8) indicating how many hours ahead or behind UTC a location is. A time zone is a named region (like America/New_York) that defines not just the standard offset but also the DST rules. Two locations can share the same UTC offset but be in different time zones with different DST rules.

India (UTC+5:30) standardised on a half-hour offset to be a single time zone for the entire country. Nepal (UTC+5:45) is the only country in the world with a 15-minute offset — set at 15 minutes ahead of India to differentiate from its neighbour. There are about 40 such non-integer offsets worldwide.