Time Zone Converter
Pick a time and a few cities. We handle the offsets and daylight saving for you.
Add a city above to convert your base time.
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Does the converter handle daylight saving time (DST) automatically?
Yes. This time zone converter never stores fixed offsets. It reads each city's UTC offset for the exact instant you enter from your browser's built-in IANA time zone database, which already knows every country's daylight saving rules and the exact dates they switch. So if the moment you pick falls after a city has sprung forward, the result reflects that automatically — a "DST" badge appears on cities that are on daylight saving time, and no offset is ever hardcoded.
How many hours ahead or behind is one city from another?
Read the UTC offset badge on each card. A city showing UTC+9:00 and another showing UTC-4:00 are 13 hours apart (9 plus 4). Because the offsets are worked out in minutes for the exact instant you chose, half-hour and quarter-hour zones such as India (UTC+5:30) and Nepal (UTC+5:45) are shown exactly, and the +1 day / -1 day badge tells you when the difference pushes a city onto the next or previous calendar day.
Where does the time zone data come from?
From the IANA time zone database that is built into your own browser and operating system — the same database phones and computers use worldwide. Nothing you enter is sent to a server: the entire conversion runs on your device, so your base time and city list stay private. Your chosen cities are saved locally with localStorage on this device, and in private browsing they simply reset when you close the tab.
How do I read the +1 day / -1 day badge when scheduling a meeting across time zones?
The badge tells you whether a city lands on a different calendar day from your base time. Say you set 4:00 PM in Los Angeles for a call: Tokyo may show the next morning with a +1 day badge, while it is still the same day for London. Checking these badges before you send an invite is the easiest way to avoid booking someone for 9 a.m. when it is really 2 a.m. the following night for them.
What time does the New York Stock Exchange open in my time zone?
The NYSE opens at 9:30 AM Eastern Time and closes at 4:00 PM Eastern. To see that in your own time, set the base time zone to New York, enter 9:30 AM, then add your own city as a card — the converter shows the exact local time and whether it falls on the same day. Because it follows daylight saving automatically, the answer stays correct whether New York is on EST in winter or EDT in summer.