Time & Date

Timezones, countdowns and date maths that actually add up.

Date Calculator

Count days between two dates, add or subtract days, weeks and months, and count working days. A free date calculator that runs in your browser.

Age Calculator

Calculate your exact age in years, months and days from your date of birth, plus the days until your next birthday. Free and instant in your browser.

World Clock & Timezone Converter

Track the current time in multiple cities, convert between timezones and translate Unix epoch timestamps. A free world clock that works offline.

Meeting Timezone Planner

Find a meeting time that works across multiple timezones with an hour-by-hour overlap view. Free, instant, no sign up needed.

Countdown Timer & Stopwatch

Count down to any date and time, or time something with a stopwatch and laps. A free online timer that keeps running in your browser tab.

Date arithmetic is easy to get wrong by one day, and timezones are easy to get wrong by an hour. These tools handle the calendar rules, daylight-saving changes and Unix timestamps so you can trust the answer: days until a deadline, your exact age, the one slot that works for London, Delhi and New York.

Everything runs locally, using your browser's own timezone database, so it works offline and never sends your dates anywhere.