This time zone converter and world clock lets you compare the current time across as many cities as you like, side by side, on a single aligned 24-hour grid. Each row is a place; each column is the same moment in time, so you can instantly see what 3pm in New York means in London, Bengaluru or Tokyo. Work hours are highlighted and night hours are dimmed, which makes it easy to spot the slots where everyone is awake and plan a meeting that actually works. Pick any future date to schedule ahead, switch between 12-hour and 24-hour display, and copy every converted time in one click. Daylight saving time is handled automatically using your browser's built-in time-zone database, and everything runs locally on your device.
Features
Compare any number of cities and time zones side by side
Aligned 24-hour grid highlights overlapping work hours
Click any hour to see that exact moment in every zone
Pick any date to plan ahead; daylight saving is handled automatically
Shows each zone's GMT offset and next/previous-day shifts
Switch between 12-hour and 24-hour display
Copy all converted times in one click for a meeting invite
Your chosen cities are remembered on this device
How to use the World Clock & Time Zone Converter
Add the cities or time zones you want to compare.
Pick the date you're planning for, or click Now for today.
Click an hour in any row to select that moment.
Read the matching local time for every city, then copy them all.
Example
Input
9:00 AM — New York (Mon 12 Jan)
Output
New York 9:00 AM · London 2:00 PM · Bengaluru 7:30 PM · Tokyo 11:00 PM
One selected moment shown across four cities.
Common errors & troubleshooting
The exact city I need isn't in the list. — Search by the nearest major city — IANA time zones are named after a representative city, so use Kolkata for all of India or Los_Angeles for US Pacific time.
An hour looks off by one near a daylight-saving change. — On the one or two days a year a zone switches DST the grid can shift an hour; click the precise hour to confirm the converted local time.
Frequently asked questions
How do I compare time zones?
Add the cities you care about and they line up on one 24-hour grid. Each column is the same instant, so reading down a column tells you the local time everywhere at once.
Does it handle daylight saving time?
Yes. Conversions use your browser's built-in IANA time-zone database, which knows each region's daylight-saving rules, so offsets are correct for the date you pick.
Can I plan a meeting across time zones?
Yes. Work hours are highlighted and night hours dimmed, so you can scan for an hour that suits everyone, click it, and copy the local times straight into an invite.
Is my data sent to a server?
No. The world clock runs entirely in your browser using your browser's built-in time-zone data, so nothing you select is uploaded to a server.
How many cities can I add?
As many as you like. The grid scrolls horizontally on smaller screens, and your selected cities are saved on this device for next time.
Does it work offline?
Yes — once the page has loaded, time-zone conversions keep working without an internet connection because the time-zone data ships with your browser.