World Time Zones at a Glance
| Time Zone | Offset from UTC | City / Region |
|---|---|---|
| IST | UTC +5:30 | India |
| UTC/GMT | UTC +0:00 | London (winter) |
| EST | UTC −5:00 | New York |
| PST | UTC −8:00 | Los Angeles |
| CET | UTC +1:00 | Paris, Berlin |
| GST / AST | UTC +4:00 | Dubai, Abu Dhabi |
| SGT | UTC +8:00 | Singapore |
| JST | UTC +9:00 | Tokyo |
| AEST | UTC +10:00 | Sydney |
IST — India Standard Time
India uses a single time zone, IST (Indian Standard Time), which is UTC+5:30. India does not observe Daylight Saving Time (DST). The 30-minute offset (rather than whole-hour) places IST between two full-hour time zones and covers the geographic centre of India.
Daylight Saving Time (DST)
Many countries (USA, UK, most of Europe, Australia) observe DST, moving clocks forward by 1 hour in summer. This means the time difference between India and these countries changes twice a year:
- IST to EST: +10:30 hours (winter) or +9:30 hours (summer DST)
- IST to GMT: +5:30 hours (winter) or +4:30 hours (summer DST)
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