Time Zone Converter
TimezoneCast converts times between any pair of time zones accurately and without guesswork. Every conversion on this page is powered by the IANA tz database — the same authoritative source used by operating systems, browsers, and programming languages worldwide.
Daylight saving time is handled automatically. Whether you're converting in January or July, in the middle of a DST transition week or outside of one, the offset used reflects the actual UTC offset at that moment — not a static guess. Conversions work for any date, not just today.
Abbreviation conversions
EST, PST, GMT, IST and more — with DST status and a full 24-hour table.
City-to-city conversions
Meeting overlap windows, live clocks, and working-hours highlighting.
- New York → London
- London → New York
- Los Angeles → Tokyo
- Tokyo → Los Angeles
- Berlin → New York
- New York → Berlin
- San Francisco → London
- London → San Francisco
- New York → Los Angeles
- Los Angeles → New York
- Chicago → London
- London → Chicago
- Toronto → London
- London → Toronto
- Sydney → New York
- New York → Sydney
- Singapore → London
- London → Singapore
- Dubai → London
- London → Dubai
Specific-time conversions
Quick answers: what time is 9AM EST in PST? 3PM GMT in IST?
How TimezoneCast handles accuracy
IANA tz database. All offsets and DST rules come from the IANA Time Zone Database (tzdata), updated whenever a government changes its rules. This is the same database that powers your phone's calendar and every major cloud platform.
Automatic DST handling. TimezoneCast never uses a fixed UTC offset like "EST = UTC−5". Instead, it resolves the actual offset for the specific date and time you're looking up, so conversions remain correct during spring-forward and fall-back transitions.
Any date, not just today. Conversion tables are computed dynamically, so they reflect the real offsets for any date you need — useful when scheduling a call three months out.