What this tool does

The Timezone Converter takes the city you live in, the moment you care about, and a list of cities your collaborators are in — then shows the exact local time everywhere, with daylight saving time handled automatically. It supports all 400+ IANA timezones (Europe/London, America/New_York, Asia/Kolkata, Pacific/Chatham …), the popular abbreviations (GMT, UTC, EST, PST, CST, MST, CET, IST, JST) and thousands of cities by name.

Everything runs locally in your browser. No accounts, no upload, no logging. Use Live mode as a multi-city wall clock; switch to Convert mode to pin a meeting time and see what it looks like for everyone else.

Why people use it

• Scheduling cross-timezone meetings — pick one time in your zone, see it in everyone else's.
• Distributed engineering teams — preset groups for SF/NYC/London/Bangalore/Sydney style rotations.
• Customer support handovers — when does the next region come online?
• Travel and flights — what time will I land in Tokyo if I leave Frankfurt at 17:30?
• Webinars and product launches — paste a share link in the calendar invite, no time-math required.
• DST audits — check whether a recurring meeting still works after a DST change.

How to use it

1. Set your source timezone. Your local zone is auto-detected on first load. To change it, search by city or by IANA name in the source row.
2. Pick a time and date. Hit Now for the current moment, or type a meeting time and pick a date with the calendar.
3. Add target cities. Use a group preset (US coasts, US ↔ EU, Global engineering, Asia-Pacific, Worldwide) or click + to add cards one by one (up to 10).
4. Convert. Click Convert to pin the source time across cities, or stay in Live mode to watch every clock tick.
5. Share. Click Copy share link — the URL captures source, targets, time and mode so anyone opening it sees the same view.

Group presets — what each one is for

• • US coasts — New York, Chicago, Denver, Los Angeles. The right starter for any all-American rollout.
• • US ↔ EU — New York, London, Paris, Berlin. The classic transatlantic pairing for SaaS and fintech teams.
• • Global engineering — San Francisco, New York, London, Bangalore, Sydney. The follow-the-sun setup most cross-timezone product orgs end up with.
• • Asia-Pacific — Tokyo, Singapore, Seoul, Sydney. APAC-only stand-ups, partner calls and gaming launches.
• • Worldwide — UTC, New York, London, Tokyo. The default world-clock view for any global announcement.

Popular timezone conversions

• GMT to EST (Eastern Standard Time)
• UTC to PST (Pacific Standard Time)
• EST to PST conversion
• CST to EST (Central to Eastern)
• CET to GMT (Central European Time)
• IST to UTC (India Standard Time)
• JST to PST (Japan to Pacific)
• MST to EST (Mountain to Eastern)
• NYC to London / London to NYC
• SF to Bangalore / Bangalore to SF
• Singapore to London / London to Singapore
• Sydney to NYC / NYC to Sydney

Live mode vs. Convert mode

Live mode is a multi-city wall clock. Each card ticks once a second and shows the current local time and date for that timezone — the right view for a team dashboard or status page. Convert mode pins one specific moment in your source timezone (e.g. "Tuesday at 15:00 in New York") and renders that exact moment everywhere else, taking DST into account for the chosen date.

Understanding timezones

GMT (Greenwich Mean Time): the mean solar time at the Royal Observatory in Greenwich, London. Often used interchangeably with UTC, although strictly speaking GMT is a timezone and UTC is a time standard.

UTC (Coordinated Universal Time): the primary time standard the world uses to regulate clocks. UTC does not shift for daylight saving — it's the right reference for logs, audit trails and scheduling.

DST (Daylight Saving Time): the practice of shifting clocks an hour forward in spring and back in autumn. Different countries adopt it on different dates — this converter handles them all per the IANA database.

Common abbreviations: EST (Eastern), PST (Pacific), CST (Central), MST (Mountain), CET (Central European), IST (India), JST (Japan), AEST (Australia East). Search by any of them or by full city name.