🕐 Timezone Converter
Convert time between any world timezone. DST-aware, real-time world clock, instant results — free, no login, 100% browser-based.
Understanding Timezones and UTC
UTC (Coordinated Universal Time) is the primary global time standard maintained by atomic clocks at the Bureau International des Poids et Mesures (BIPM). It replaced GMT (Greenwich Mean Time) as the world standard in 1972. All other timezones are expressed as offsets from UTC: New York is UTC-5 (UTC-4 during DST), Tokyo is UTC+9 (no DST), Pakistan Standard Time is UTC+5, India Standard Time is UTC+5:30.
UTC is used universally in aviation, international banking, internet protocols (Unix timestamps, HTTP headers, ISO 8601 dates), scientific publications, and any context requiring a universal reference point unaffected by local Daylight Saving Time adjustments. This tool uses the browser's native Intl.DateTimeFormat API (ECMA-402) to automatically apply correct DST offsets based on the date — no manual adjustment needed.
Best Meeting Times for International Teams — Quick Reference
| UTC | New York (ET) | London (GMT) | Dubai (GST) | Pakistan (PKT) | India (IST) |
|---|---|---|---|---|---|
| 08:00 | 03:00 AM | 08:00 AM | 12:00 PM | 01:00 PM | 01:30 PM |
| 14:00 | 09:00 AM ✅ | 02:00 PM ✅ | 06:00 PM ✅ | 07:00 PM ✅ | 07:30 PM ✅ |
| 18:00 | 01:00 PM | 06:00 PM | 10:00 PM | 11:00 PM | 11:30 PM |
Frequently Asked Questions
What is UTC and why is it the global standard?
UTC (Coordinated Universal Time) is maintained by atomic clocks at the BIPM and serves as the universal reference point for all other timezones. It replaced GMT in 1972 and is used in aviation, banking, internet protocols (Unix timestamps), and all scientific contexts. All timezones are expressed as UTC offsets (e.g., Pakistan = UTC+5, India = UTC+5:30).
What is DST and which countries observe it?
DST (Daylight Saving Time) advances clocks by 1 hour in summer to extend evening daylight. Countries observing it: US (most states), Canada, most of Europe, Australia (southern), New Zealand. Countries that do NOT observe DST: China, Japan, India, Pakistan, most of Africa, and most of Southeast Asia. This tool automatically applies correct DST offsets using the browser's native Intl API.
What is the best time to schedule a US-UK-India meeting?
Optimal overlap: 8–10 AM US Eastern = 1–3 PM UK = 6:30–8:30 PM India. This window works for all three without extremely early or late times. For US West Coast + UK + India, 8 AM Pacific (11 AM ET, 4 PM UK, 9:30 PM IST) is the best compromise.