Support us
Help keep BdayChecker free
Every calculator on BdayChecker is free and needs no account. If a tool helped you plan a party, settle a family debate or count down to a big day, you can chip in to keep it running.
Become a supporter
Support options open soon. In the meantime, sharing a tool with a friend helps just as much.
Support is a gift to a small independent site, not a tax-deductible donation.
What your support pays for
Hosting and data
Keeping the site fast and online, and the birth data and calendars behind every tool up to date.
More calculators
Time to build, test and write up new tools, and to check every rule against its source.
The mobile app
Getting the birthday reminders app onto Android first, then iPhone.
Other ways to help
Share a tool with a friend who has a birthday coming up. Tell us when something looks wrong, or which calculator you wish existed, at contact@bdaychecker.com.