What is TimezoneCast?

TimezoneCast is a free visual time zone converter and world clock for comparing cities, finding meeting overlap, and sharing time zone plans.

How do I find the best meeting time across time zones?

Add each city, then move the time cursor until the working-hour bands overlap. That overlap is usually the best meeting window.

Can I share a time zone comparison?

Yes. Use the Share button to copy a link that encodes your selected cities, date, and time. Anyone who opens it sees exactly your setup.

Does TimezoneCast handle daylight saving time?

Yes. TimezoneCast uses IANA time zone data so daylight saving time changes are handled automatically for every city.

Is TimezoneCast free?

Yes. TimezoneCast is completely free and does not require sign-up.

About TimezoneCast

TimezoneCast is a free, visual world clock and time zone converter built for people who work across cities and continents every day. No ads, no account, no clutter — just your cities, their current time, and a clear way to find the right moment to meet.

Why it exists

Scheduling a call between New York, Berlin, and Kolkata shouldn't require a spreadsheet. Most time zone tools either overwhelm you with dropdowns, require a sign-in, or show you a static number without telling you whether that time is inside working hours for everyone.

TimezoneCast takes a different approach: show all your cities as a visual timeline, let you drag to any hour, and immediately highlight where working windows overlap. The answer is visible in seconds.

What it does

·Compare multiple cities side by side in a scrollable time grid
·Drag a cursor to any hour and see all local times update instantly
·Highlight overlapping working hours (9 AM–6 PM) across all cities
·Export .ics calendar invites for Google Calendar, Outlook, and Apple Calendar
·Share a setup link that encodes your cities, date, and time
·Support IANA named zones and fixed UTC offsets from UTC−12 to UTC+14
·Handle daylight saving time automatically — no manual adjustments

Philosophy

TimezoneCast is built on three principles: accuracy, speed, and honesty.

Accuracy — All time zone math uses the IANA tz database via Luxon. DST transitions are calculated automatically. Nothing is hard-coded. See the methodology page for details on how calculations work and where the tool's limitations are.

Speed — The page loads instantly. There's no server round-trip for a conversion. The interactive widget runs entirely in your browser after the initial page load.

Honesty — TimezoneCast is free and doesn't require a sign-up. It doesn't track you beyond anonymous page-load analytics (Vercel Analytics, no personal data). It doesn't upsell a paid tier. What you see is what it is.

Questions or feedback?

If you find a bug, a wrong DST date, or a city that looks off, please reach out. Accuracy corrections are taken seriously and fixed promptly.