INTERACTIVE TIME ZONE MAP

How Time Zones Work

Time zones were established in the 19th century to standardize time across the world as global travel and communication increased. The Earth is divided into 24 time zones, each roughly 15 degrees of longitude wide, corresponding to one hour of time difference. The reference point is Coordinated Universal Time (UTC), based on the Prime Meridian at Greenwich, London.

Some countries observe Daylight Saving Time (DST), shifting their clocks forward or backward seasonally, which can affect time differences. Use our interactive map to explore current times, or visit our Converter to compare time zones and plan travel.

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