How to use the converter
Enter a date and time, choose the from and to zones, and the converted time appears with its day-of-week and whether it lands on the next or previous day. The two clocks underneath show the current time in each zone; expand the table for every hour of the chosen day. Daylight saving is applied automatically for the date you pick — no need to think about PST vs PDT.
Popular conversions
How time zones work
Every zone is defined as an offset from UTC (Coordinated Universal Time), the reference clock kept by atomic clocks. New York is UTC−5, so when it’s 12:00 UTC it’s 7:00 AM in New York. India is UTC+5:30 — one of a handful of zones on a half-hour offset (Nepal is even on +5:45).
Daylight saving time moves a zone’s offset forward one hour in summer. The US and Canada spring forward on the second Sunday in March and fall back on the first Sunday in November; the UK and EU on the last Sundays of March and October; Australia’s south-eastern states in the opposite direction, October to April. Most of Asia, Africa and South America don’t observe it at all. Because these dates differ, the gap between, say, London and Sydney changes three times a year.
Reference: standard offsets
| Zone | Standard | Daylight | Where |
|---|---|---|---|
| PST / PDT | UTC−8 | UTC−7 | Los Angeles, Seattle, Vancouver |
| MST / MDT | UTC−7 | UTC−6 | Denver, Phoenix (no DST) |
| CST / CDT | UTC−6 | UTC−5 | Chicago, Dallas, Mexico City |
| EST / EDT | UTC−5 | UTC−4 | New York, Toronto, Miami |
| GMT / BST | UTC+0 | UTC+1 | London, Dublin, Lisbon |
| CET / CEST | UTC+1 | UTC+2 | Paris, Berlin, Madrid, Rome |
| IST | UTC+5:30 | — | India |
| CST (China) | UTC+8 | — | Beijing, Shanghai, Singapore (SGT), Hong Kong (HKT), Perth (AWST) |
| JST / KST | UTC+9 | — | Tokyo, Seoul |
| AEST / AEDT | UTC+10 | UTC+11 | Sydney, Melbourne, Brisbane (no DST) |
Tips for meetings across zones
- Suggest times in the other person’s zone and your own, e.g. “3 PM your time / 9 AM mine”.
- For US–India calls, early US morning (7–9 AM ET) is late India evening (5:30–7:30 PM IST) — the usual overlap.
- For US–Europe, the window is US morning / European afternoon.
- For US East Coast–Sydney, there’s almost no overlap in normal hours; evening in New York is the next morning in Sydney.
- Watch the two weeks in March and the one in October/November when the US and Europe are out of step on DST — recurring meetings shift by an hour.
Frequently asked questions
What's the difference between PST and PDT?
PST (Pacific Standard Time, UTC−8) runs from early November to mid-March; PDT (Pacific Daylight Time, UTC−7) the rest of the year. People say 'PST' for both. The converter checks the date and applies the right one — the same goes for EST/EDT, CST/CDT, MST/MDT, GMT/BST and CET/CEST.
Why is the difference between two zones not always the same?
Because they switch to daylight saving on different dates, or one doesn't switch at all. New York and London are usually 5 hours apart but 4 hours for a few weeks each spring and autumn; India and Arizona never change, so their gap to DST zones shifts twice a year.
Is GMT the same as UTC?
For everyday purposes yes — both are UTC+0 with no daylight saving. The UK itself uses GMT in winter and BST (UTC+1) in summer, which is why "GMT" in a British meeting invite may actually mean BST.
How do I avoid scheduling mistakes across zones?
State the zone explicitly with the city, not just the abbreviation ("9 AM Eastern / New York"), because CST means both Central US and China Standard Time, and IST means both India and Israel. Then send a calendar invite — calendars convert automatically for each attendee.
Last updated August 30, 2026.