About Athena Kits

Athena Kits is a small, independent collection of free, practical tools, starting with date calculators. It was built because many date calculators online are slow, cluttered or quietly wrong around leap years and month ends.

The name comes from Athena, the Greek goddess of wisdom who was also the patron of crafts and practical skill. That is the spirit of this site: simple tools that help you work something out correctly and get on with your day.

Every calculator on this site runs entirely in your web browser. The dates you enter are never sent to a server or stored. The site is supported by advertising, which keeps the tools free to use.

Found a mistake or want a calculator that is not here yet? Please get in touch through the contact page.