Time Zone Difference Calculator
Find the time difference between any two UTC offsets. Useful for scheduling international calls, planning arrivals, or understanding jet lag.
Understanding Time Zones
UTC Explained
UTC (Coordinated Universal Time) is the global time standard. All time zones are expressed as UTC+ or UTC−. The UK is UTC+0 (GMT) in winter and UTC+1 (BST) in summer. The US spans UTC−5 (EST) to UTC−8 (PST).
Daylight Saving Time
DST shifts clocks forward 1 hour in spring and back in autumn. Most of Europe, North America, and Australia observe DST. The date differs by country — check current offsets when planning important calls.
Jet Lag
Jet lag is caused by your body clock not matching the local time at your destination. Adjust sleep times toward the destination zone a few days before travel, use light exposure strategically on arrival, and avoid naps that prevent nighttime sleep.
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