About Date Tools

What this site is

Date Tools answers everyday date questions: how old someone is, how many days there are between two dates, how long until a date arrives, what date falls a number of days from now, and which day of the week a date falls on. Each tool is a single page that does one job, with a plain-English explanation of how the answer is worked out.

The site is free to use. There are no accounts, no downloads and no sign-up. The tools are the whole site — nothing else is required to use them.

Privacy first

Every calculation runs entirely in your web browser. The dates you enter never leave your device: nothing is sent to a server, stored, or shared. The site uses no cookies, no analytics and no third-party content. You can read the full details in the Privacy Policy.

Accuracy

The calculators use the Gregorian calendar and handle leap years correctly. Each tool page shows a worked example with real dates, so you can check the method by hand. If you ever spot a wrong result, please tell us through the Contact page — corrections are welcome.

The tools

• Age Calculator — exact age in years, months and days.
• Days Between Dates — count the days between two dates.
• Days Until — Countdown — count down to a future date.
• Add or Subtract Days — move a date forward or backward.
• Day of the Week — find the weekday of any date.