Time Zone Converter
Convert date-times between IANA time zones with daylight-saving offsets. Runs privately in your browser.
Convert a local date and time
Choose IANA time zones such as Asia/Manila, Europe/London, or America/New_York. Daylight-saving offsets are resolved for the selected date.
Conversion uses your browser's built-in internationalization data. Nothing is uploaded and no location permission is requested.
How to Use This Tool
Enter the local source date and time, or choose Now.
Select the source and target IANA time zones.
Convert the time, review both UTC offsets, and copy the target value.
Frequently Asked Questions
Yes. It resolves the UTC offset that applies in each selected zone on the entered date.
The converter shows first and second occurrence choices for ambiguous fall-back times and defaults to the first occurrence.
Spring-forward gaps produce an inline error so you can choose a valid local time.
It is a region-based identifier such as Asia/Manila or America/New_York that carries historical and daylight-saving rules.
Before You Use This Tool
A quick overview of what this page is good for, how it handles data, and what to expect before you start.
What It Does
- Convert date-times between IANA time zones with daylight-saving offsets
- Runs privately in your browser
Access & Privacy
You can use the main workflow without creating an account.
The main workflow runs in your browser, so files stay on this device during processing.
Good Fit For
- Solve one-off browser tasks quickly.
- Get useful output without installing anything first.
- Handle small jobs directly on the page and move on.
For repeated bulk jobs or advanced automation, dedicated desktop software may still be faster.