Time Zone Tools
Time zones are identifiers (such as America/New_York or Asia/Kolkata), not fixed offsets. The same identifier can mean different offsets during the year because of daylight saving, and offsets themselves range from −12:00 to +14:00. These tools use your browser’s IANA time-zone database, so conversions account for the exact date you choose, including DST shifts.
Time Zone Converter
Convert a time between any IANA time zones with DST handled for the date.
World Clock
Track current time in cities you choose, saved in your browser.
Current Time by City
Search a curated list of world cities and see their live local time.
Daylight Saving Time Checker
Check whether a zone observes DST and when clocks change in a given year.
Meeting Time Planner
Find fair meeting times across multiple zones with a comparison table.
Time Difference Calculator
See how far apart two time zones are and whether that gap changes.
When to use these tools
- Scheduling calls and meetings with people in other zones
- Checking whether a location is currently on daylight saving time
- Keeping a personal world clock of cities you work with
- Understanding why a time difference changes during the year
Frequently asked questions
Why is an offset like +05:30 not enough for conversions?
What happens on the night clocks change?
Where does the time zone data come from?
Other categories
Timestamp Tools
Convert Unix timestamps, epoch seconds, and milliseconds to and from human dates.
Time Converters
Switch between 12-hour, 24-hour, and military time formats instantly.
Date Calculators
Days between dates, age, business days, week numbers, and more.
Timers
Countdown timer, stopwatch, and Pomodoro sessions that stay accurate.
Work & Hours Tools
Shift durations with breaks, overnight handling, and decimal hours.