Timezone Converter
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Convert time between any two IANA timezones, plan meetings across regions, and inspect the current time around the world. Click a band on the offset strip below to filter timezones by their UTC offset.
Interactive UTC Offset Strip
Click a band to filter timezones by its UTC offset. Use arrow keys for keyboard navigation.
Convert Between Timezones
Converted Time
World Clock
Current time in major timezones. Updates every second.
What is a Timezone Converter?
A timezone converter is a tool that translates a specific date and time from one timezone to another. The world is divided into 24 main time zones, each centered around a UTC (Coordinated Universal Time) offset, plus a few half-hour and quarter-hour offsets (e.g., India at UTC+05:30, Nepal at UTC+05:45).
Timezones are identified by IANA names (such as Asia/Jakarta or America/New_York) rather than numeric offsets, because most regions observe Daylight Saving Time (DST) and shift their offset seasonally. The IANA database keeps track of these transitions and historical changes automatically.
How to Use This Timezone Converter
- Pick the source timezone — Use the dropdown or click a band on the offset strip to filter by UTC offset.
- Enter the date and time — Type or pick a wall-clock time in the source timezone. Click "Use Current Time" to start from now.
- Add target timezones — Click "Add Target" to compare the same moment in one or more other timezones (e.g., Jakarta → Tokyo, London, New York).
- Copy results — Use the copy icon next to each result to copy the converted time to your clipboard.
- Watch the world clock — The bottom panel shows the current time in major cities in real time.
Frequently Asked Questions
What is UTC?
UTC (Coordinated Universal Time) is the primary time standard the world uses to regulate clocks. It is not adjusted for daylight saving time, so it stays constant year-round. Timezone offsets are expressed as a positive or negative shift from UTC (e.g., UTC+07:00, UTC-05:00).
What is an IANA timezone?
IANA (Internet Assigned Numbers Authority) maintains the tz database — a standard list of timezone identifiers like Asia/Jakarta, Europe/London, and America/Los_Angeles. These names encode both the region and a representative city, and they automatically handle DST and historical offset changes.
What is Daylight Saving Time (DST)?
DST is the practice of moving clocks forward by one hour during warmer months so that evenings have more daylight. Not all countries observe DST, and the start and end dates vary. This converter computes the correct offset for the selected date so DST transitions are handled automatically.
Why does the UTC offset for a city change during the year?
If a city observes DST, its UTC offset shifts by one hour twice a year (in spring and autumn). For example, New York is UTC-05:00 during standard time (EST) and UTC-04:00 during daylight saving time (EDT).
Does this tool send my data to a server?
No. All conversions run in your browser using the built-in Intl.DateTimeFormat API. No timezone data is uploaded, and no analytics are collected.