Bonus Birthdays – Track unique age milestones beyond regular birthdays

Summary: Bonus Birthdays is a calendar app that calculates unusual age milestones like your 10,000th day or 1-billionth second. It identifies mathematically significant dates between standard birthdays and syncs them to your calendar for reminders.

What it does

The app finds hidden milestones based on your birthdate, such as specific day counts or second counts, and allows syncing these dates to your calendar.

Who it's for

It is designed for individuals interested in tracking unique personal milestones or surprising friends with notifications on their special age markers.

Why it matters

It reveals meaningful age milestones that occur between regular birthdays, providing additional reasons to celebrate or acknowledge time passing.