Quick Timezone Conversion Cheat Sheet

Top 8 Most-Used Conversions

EST → PST

Difference: -3 hours

12:00 PM EST = 9:00 AM PST

PST → EST

Difference: +3 hours

9:00 AM PST = 12:00 PM EST

IST → PST

Difference: -13.5 hours

2:00 PM IST = 12:30 AM PST

IST → EST

Difference: -10.5 hours

2:00 PM IST = 3:30 AM EST

EST → GMT

Difference: +5 hours

12:00 PM EST = 5:00 PM GMT

GMT → EST

Difference: -5 hours

5:00 PM GMT = 12:00 PM EST

CST → EST

Difference: +1 hour

11:00 AM CST = 12:00 PM EST

UTC → IST

Difference: +5.5 hours

12:00 PM UTC = 5:30 PM IST

Standard-time differences. While the US is on daylight time (Mar 8 to Nov 1, 2026), IST is 12.5 hours ahead of PDT and 9.5 hours ahead of EDT.

UTC Offset Quick Reference

Zone	UTC Offset	Key Cities	DST
PST	UTC-8	LA, Seattle, San Francisco	Yes (PDT)
MST	UTC-7	Denver, Phoenix	Yes (MDT)*
CST	UTC-6	Chicago, Dallas, Mexico City	Yes (CDT)**
EST	UTC-5	NYC, Toronto, Miami	Yes (EDT)
GMT/UTC	UTC±0	London, Lisbon	Yes (BST/WEST)
CET	UTC+1	Paris, Berlin, Rome	Yes (CEST)
IST	UTC+5:30	Mumbai, Delhi, Bangalore	No
CST (China)	UTC+8	Beijing, Shanghai, HK	No
JST / KST	UTC+9	Tokyo, Seoul	No
AEST	UTC+10	Sydney, Melbourne	Yes (AEDT)

*Phoenix (Arizona) does not observe DST. **Mexico City is UTC-6 all year (no DST since 2022). Vancouver is now UTC-7 all year: British Columbia stopped changing clocks in 2026.

⏰ 2026 DST Dates

USA/Canada DST 2026:
Spring Forward: March 8, 2026 (2:00 AM → 3:00 AM)
Fall Back: November 1, 2026 (2:00 AM → 1:00 AM)
Not in BC, Alberta, NWT or Manitoba, which stay on summer time from November 2026. No DST in Saskatchewan, Yukon, Hawaii or most of Arizona.

EU and UK DST 2026:
Spring Forward: March 29, 2026 at 01:00 UTC (UK 1:00 → 2:00 AM; CET 2:00 → 3:00 AM)
Fall Back: October 25, 2026 at 01:00 UTC (UK 2:00 → 1:00 AM; CET 3:00 → 2:00 AM)

Australia DST 2026 (NSW, VIC, TAS, SA, ACT):
Fall Back: April 5, 2026 (3:00 AM → 2:00 AM)
Spring Forward: October 4, 2026 (2:00 AM → 3:00 AM)

2027: US/Canada Mar 14 and Nov 7 · EU/UK Mar 28 and Oct 31 · Australia back Apr 4, forward Oct 3

Tips

DST gaps: US time zones all change at 2:00 AM local time, so New York to Los Angeles stays 3 hours (apart from a few hours on the change night). The US and Europe change on different dates, though. New York to London is 4 hours (not 5) from Mar 8 to 29 and from Oct 25 to Nov 1, 2026.

Invites: Always name the time zone (e.g. "2:00 PM ET" or "2:00 PM New York"). "EST" is only correct in winter.

For Developers: Store all timestamps in UTC, convert to local time only for display

Recurring Events: Use timezone-aware calendar apps. A "9 AM Monday call" should stay at 9 AM local time even through DST changes.

🤝 Best Meeting Times (Global Teams)

Team Locations	Best Meeting Time	Notes
USA East + India	8-10 AM EST (6:30-8:30 PM IST)	Morning US, evening India
USA West + Europe	8-11 AM PST (4-7 PM GMT)	Morning US, late afternoon EU
Asia + USA West	6-8 PM PST (11 AM-1 PM JST / 10 AM-12 PM China, next day)	Evening US, morning Asia
Australia + USA East	7-9 PM EDT (9-11 AM AEST next day, Apr 5 to Oct 4, 2026)	Nov-Mar (EST/AEDT): 11 AM-1 PM Sydney

Times use standard time unless marked. During US daylight time, the India and Asia times shown are 1 hour earlier.