Timezone Converter
Convert a date and time across major timezones at once, from UTC to Sydney.
How this tool works
Enter a date and time
Any date and time, in the format your browser's date picker gives you.
Pick the source timezone
The timezone that date and time is actually in.
See six zones at once
UTC, US Eastern, US Pacific, London, Tokyo, and Sydney all convert together.
Use "Now" for the current moment
Jump straight to the current date and time in your source timezone.
Quick facts
- Category
- Converters
- Best for
- Scheduling a meeting across time zones without miscounting a daylight saving offset
About this tool
Enter a date and time along with the timezone it's in, and see the equivalent moment across six major timezones at once - UTC, US Eastern, US Pacific, London, Tokyo, and Sydney - rather than converting one pair at a time. The conversion is computed using the browser's native Intl.DateTimeFormat with its timeZone option, which correctly accounts for daylight saving time based on the actual date involved rather than applying a fixed offset - a meeting scheduled in New York in January converts differently than one in July, exactly as it should. This is genuinely different from a fixed UTC-offset calculation, which silently gets DST-affected zones wrong for roughly half the year. Useful for scheduling a meeting across time zones, converting a server log timestamp to local time, or double-checking when a "9am Pacific" deadline actually lands for a team in Tokyo. Runs entirely client-side.
Why use this tool
Correct daylight saving handling
Uses the real IANA timezone database via Intl.DateTimeFormat, not a fixed offset that breaks half the year.
Six zones at once
See the full spread across major regions instead of converting one pair at a time.
No manual offset math
Skip mentally tracking "is it +5 or +4 this time of year" for a given zone.
One-click current time
The "Now" button jumps straight to the current moment in your chosen source timezone.
Frequently asked questions
Daylight saving time means many timezones shift their UTC offset by an hour for part of the year - US Eastern is UTC-5 in January but UTC-4 in July, for example. This tool uses the browser's built-in Intl.DateTimeFormat with the actual IANA timezone identifier (like "America/New_York"), which has the real historical and current DST rules built in, so the conversion is correct for whatever date you enter rather than assuming a fixed offset year-round.
The source dropdown includes more zones than the six always-shown targets - US Central, US Mountain, Paris, India, and China are also available as a source timezone, and whichever one you pick converts correctly into all six target zones alongside it.
The tool computes the conversion, then double-checks the resulting instant's own offset and re-adjusts if it landed on the wrong side of a transition - this handles the edge case where a naive single-pass calculation could be off by an hour for times within the transition window itself.
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