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Have you ever wondered exactly when you turn 1 billion seconds old? Or what day you hit 10,000 days on Earth?
Bonus Birthdays is a calendar app that finds the weird, wonderful, and mathematically sound milestones hiding between your real birthdays. It’s perfect for finding your own next party, or better yet—entering a friend’s date so you can completely surprise them with a congratulatory text on their 400th month!
Because waiting 365 days for cake is just too long 🍰

Bonus BirthdaysTrack your 10,000th day and other hidden milestones
Eirik Iglandleft a comment
A few weeks ago, I had a shower thought: I'm turning 33.33 years old this year. Exactly one-third of the way to 100! This got me thinking—what other interesting age milestones am I missing out on because I'm just waiting around for my regular birthday? So, I built Bonus Birthdays to find them. It calculates things like your 10,000th day, your 1-billionth second, and a bunch of curated...

Bonus BirthdaysTrack your 10,000th day and other hidden milestones
