Birthday Reminder
Never miss a birthday — track upcoming ones at a glance.
Add a birthday
We'll email a reminder 4 hours before. Names and dates below are visible to anyone on this page; email addresses are stored privately and never shown.
How this calculator works
Add a name, date of birth and email, and we store just enough to work out when their next birthday falls and send a reminder email roughly 3-5 hours beforehand. The countdown recalculates the next occurrence automatically each year, so you only need to enter someone once.
How the reminder timing actually works
A scheduled job checks all saved birthdays once a day and sends a reminder to anyone whose next birthday falls within a 3-5 hour window from that check — a fixed daily check rather than continuous real-time monitoring, which is why the reminder lands within a window rather than at an exact time you choose. Each birthday is only reminded once per year, tracked automatically so you won't get a duplicate.
This is a shared list, not a private one
Names and dates entered here are visible to anyone using this page — treat it as a shared list, not a private one tied to your own account, since there's no login system separating one visitor's entries from another's. Email addresses are the exception: they're used only to send the reminder and are never displayed or returned anywhere on the page.
Frequently Asked Questions
How does the birthday reminder notify me?
It sends an email reminder roughly 3-5 hours before the birthday you've saved — this is one of the few tools on the site that stores data (the birthday entry) so it can trigger that future reminder.
Is my birthday list private to me?
No — this is a shared list, not a private one tied to an account. Names and dates entered here are visible to anyone using the page, since there's no login system separating one visitor's entries from another's. Email addresses are the exception: they're used only to send the reminder and are never displayed.
Can I add multiple birthdays?
Yes — add as many as you like, and each one shows a live countdown to the next occurrence alongside the stored reminder.
Why is the reminder sent within a window instead of an exact time?
A scheduled job checks all saved birthdays once a day rather than monitoring continuously, sending reminders to anyone whose birthday falls within a 3-5 hour window at that check. Each birthday is only reminded once per year, tracked automatically.
Can I remove a birthday I added by mistake?
Yes — every entry in the list has a remove option, and deleting it stops any future reminder email for that entry immediately.