Bonus Birthdays
Track your 10,000th day and other hidden milestones
What it does
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 🍰
Does the same job
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- IBI built a text-based birthday reminder app2025 · birthdays.app · ▲46
I bought the birthdays.app domain a few years ago and decided to build a simple birthday app, just text message reminders. I had hacked together a duct-tape version for myself a couple years prior (using zapier + google sheets), and found it useful. It was a pain sifting through Facebook birthdays (90% irrelevant), and I found the text reminders simpler than a calendar. The app has been slowly growing since 2023, and is now up to 739 paying users (mostly on the $9/yr plan, with a few paying $3/yr). Earlier this year, I built a Google Calendar integration to automatically sync…
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