Convert time between major world time zones instantly. Essential for international meetings, travel planning, and global coordination.
Last updated: March 2026 | By Patchworkr Team
Time zones are regions of Earth that observe a uniform standard time for legal, commercial, and social purposes. They're defined by their offset from Coordinated Universal Time (UTC), measured in hours and sometimes half-hours.
The world is divided into 24 main time zones (one for each hour), though there are additional zones with 30-minute and 45-minute offsets. This system helps coordinate activities across different geographic locations.
Time zone conversion is essential for international business, travel planning, scheduling virtual meetings, coordinating global events, and understanding when something happens "your time."
Practically, they're the same. UTC (Coordinated Universal Time) is the time standard, while GMT (Greenwich Mean Time) is a time zone. UTC is more precise and doesn't observe daylight saving time.
Time zones are political boundaries, not strictly geographic. Countries like India (UTC+5:30), Iran (UTC+3:30), and parts of Australia use half-hour offsets for political or practical reasons.
During DST, participating regions shift their clocks forward (usually +1 hour). This changes their UTC offset. For example, EST becomes EDT (UTC-4 instead of UTC-5). This converter uses standard time only.
An imaginary line roughly along 180° longitude where the date changes. Crossing westward adds a day; crossing eastward subtracts a day. This is why some Pacific islands can be 25 hours apart.
Most countries near the equator don't use DST (minimal seasonal daylight variation). Major examples: China, India, Japan, most of Africa, and parts of Australia. Arizona (US) also doesn't observe DST.
Always reference UTC or specify time zones clearly (e.g., '3 PM EST'). Use scheduling tools that auto-convert time zones. Consider 9 AM-5 PM working hours in all relevant zones.
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