What the tool shows
- Reference time — the moment everything is compared against. Leave it on Live now to track the current time as it ticks, or pin a specific date and time to plan ahead.
- Local time per zone — the same instant expressed as the wall-clock time, weekday, and date in each timezone you add, side by side.
- UTC offset — how far each zone is from Coordinated Universal Time (for example
UTC+8orUTC−5:30), for the exact moment shown. - Day badge — a
+1 dayor−1 daymarker appears when a zone falls on a different calendar day than your reference zone, so a late-night call across the date line is easy to spot.
How it works
Pick a reference timezone and add as many others as you like. Every card shows the same instant — either the live current time or a moment you pin — re-expressed in that zone. Conversions use your browser's built-in Intl timezone database, which follows the standard IANA rules for every region.
Offsets are calculated for the exact moment being shown, so daylight saving time is applied automatically — a zone will read UTC+1 in winter and UTC+2 in summer without you changing anything. When you pin a time, the tool reads it as wall-clock time in your reference zone, converts it to a single real instant, and then shows that instant everywhere else.
Frequently asked questions
Is anything I enter uploaded or saved?
No. The timezone converter runs entirely in your browser. The zones you add and any time you pin stay on your device — nothing is uploaded, logged, or stored, and reloading the page resets it.
Does it handle daylight saving time?
Yes, automatically. Every offset is computed for the specific instant shown using the IANA timezone rules, so zones that observe daylight saving switch on their correct dates without any manual toggle.
What does the “+1 day” or “−1 day” badge mean?
It means that zone is on a different calendar day than your reference zone at that moment. For example, when it's late evening in New York it may already be tomorrow in Tokyo, so Tokyo shows
+1 day.Can I use it to plan a meeting across time zones?
Yes — that's what Pin a time is for. Set the reference zone to your own, pin the date and time of the call, and every other card shows the matching local time so you can find a slot that works for everyone.
Are the times and offsets accurate?
They come from the same IANA timezone data browsers and operating systems use, so they match standard sources. Very rare, last-minute government changes to a country's rules depend on your device and browser being up to date.
Why does it show a dash instead of a time?
The cards only show a time once there's a valid reference moment. If you cleared the pinned date/time or it's incomplete, you'll see a dash — finish entering the date and time, or tap Live now to use the current time.