Convert a time from one zone to another — with daylight saving time handled correctly
💡 Why This Matters Scheduling across time zones gets error-prone fast, especially around daylight saving time — a fixed "add 8 hours" rule that's correct in winter can be wrong in summer. This converter uses each region's real time zone rules, so the conversion is accurate on any date of the year.
China spans a landmass wide enough for five geographic time zones, but the entire country officially uses just one — Beijing Time — for political unity, meaning the sun rises and sets at wildly different clock times across the country.
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This converter uses your browser's built-in time zone database, the same system used by phones and computers worldwide, to look up the exact UTC offset for each region on the specific date you select — not a fixed, year-round offset. That's the key difference from simple "add N hours" math: the offset for a region like New York shifts by an hour twice a year due to daylight saving time, and the converter accounts for that automatically based on the date entered.
The main result shows the equivalent local time in your destination zone. The breakdown underneath shows whether the conversion crosses into a different calendar day (common with large time differences) and the current time difference between the two zones in hours — which itself can change across the year if one or both zones observe daylight saving time.
This converter relies on your device's time zone database being current — extremely rare region-specific policy changes (a country adjusting its DST rules) may take time to propagate to all devices. It also doesn't account for historical time zone rules before certain dates, since those can differ from current rules.
Use this to schedule calls, flights, or events across regions without doing error-prone mental math — especially useful right around daylight saving transitions in March/April and October/November, when manual "just add the usual number of hours" calculations are most likely to be wrong.
Example: Say it's 3:00 PM on a June afternoon in New York. New York observes Eastern Daylight Time in June (UTC−4), while Tokyo is UTC+9 year-round. The difference is 13 hours, so 3:00 PM in New York converts to 4:00 AM the next day in Tokyo. Note that in January, New York would be on Eastern Standard Time (UTC−5) instead — a 14-hour difference — so the same 3:00 PM would convert to 5:00 AM the next day instead.
Yes — this converter uses each region's actual time zone rules, including daylight saving time transitions, rather than a fixed UTC offset. That means the conversion is correct whether the date falls in standard time or daylight saving time for each zone.
Not every time zone is offset from UTC by a whole hour. Regions like India (UTC+5:30), Nepal (UTC+5:45), and parts of Australia use half-hour or 45-minute offsets, usually chosen historically to align more closely with local solar time or neighboring regions.
A UTC offset is just a fixed number of hours/minutes from Coordinated Universal Time. A time zone is a named region with rules for when that offset changes, such as daylight saving time — so the same time zone can have different UTC offsets at different times of year, while a UTC offset alone never changes.