HowLong? - Date Calculator

HowLong? turns any date into an answer. Pick a calculator, choose a date, and see exactly how much time has passed or how much is left.

What you can calculate
- Days since you were born, since you met, or since the wedding
- Countdowns to a discharge day, a payday, Christmas or any date you pick
- The exact span between two dates
- The date N days later or earlier
- Your exact age as of today
- Hours worked, with the break taken off
- The time difference between two cities

Every result, several ways
A result is never just one number. The same span is shown in days, weeks, months, years, hours and minutes, together with the next milestone worth waiting for: the next 1,000 days, or the next birthday.

Keep the dates that matter
Save a result to My dates and it keeps counting on its own. The list separates the days counting up from the ones still counting down, so an anniversary and a deadline never sit in the same pile.

Share it as a card
Turn a saved date into a portrait card and send it straight to a chat. The picture is made at the shape a message preview expects, so nothing is cropped away.

Twelve languages
English, Korean, Japanese, Simplified Chinese, Spanish, Portuguese, French, German, Russian, Italian, Indonesian and Vietnamese. The app follows your device language, and dates, clock times and numbers are written the way your language writes them.

Your dates stay on your phone
There is no account and no server of ours. Saved dates live in the app's own storage on your device, and removing the app removes them. HowLong? is free and supported by ads.