Time Zone Converter

Time zones divide the world into regions that share a standard local time, each defined by an offset from Coordinated Universal Time (UTC). UTC+0 is the reference point — London in winter. New York is UTC-5, Dubai UTC+4, Tokyo UTC+9. Daylight Saving Time (DST): Many countries shift clocks forward 1 hour in spring and back in autumn to extend evening daylight. This means the UTC offset for a city changes twice a year. Not all countries observe DST — China, Japan, India, and most of Africa do not. IDL (International Date Line): Crossing the date line (roughly 180° longitude) changes the calendar date. Flying westward from the US to Asia means jumping forward a day. Business across time zones: A meeting at 9am EST is 2pm GMT and 10pm in Singapore. When scheduling globally, always specify the time zone — 'noon EST' is unambiguous, 'noon' is not. Common UTC offsets: UTC-8 (LA/Vancouver), UTC-5 (New York/Toronto), UTC+0 (London/Lisbon), UTC+1 (Paris/Berlin), UTC+3 (Istanbul/Riyadh), UTC+5:30 (India), UTC+8 (China/Singapore), UTC+9 (Tokyo/Seoul).