Set your birthday once. Watch the days you have left tick down — on this page, on your home screen, as your screensaver. The number changes everything.
Set the clock.
We never send your birthday anywhere. It lives in your browser. You can change the target age — Kevin Kelly uses 90, the US average is ~78–82.
Days remaining
—
until age 85
—weeks—hours—minutes—seconds
Estimated end date: —
0% lived100% remaining
Your life in weeks.
Each square is one week. Tim Urban's tail end — the gold cells are already spent. The pulsing one is this week.
Heads up — the shareable URL contains your birthday in plain query parameters. If you post the link publicly, your birthday becomes public too. The QR + Text + Email options send the same URL to wherever you choose.
Put it where you'll see it.
On your iPhone (home-screen icon)
Open this page in Safari on your iPhone.
Tap the Share button (square with arrow) at the bottom.
Tap Add to Home Screen. Name it "Death Clock." Tap one tap and the clock opens full-screen — no Safari chrome.
For a lock-screen widget showing the count: download Widgetsmith (free, App Store) → add a Countdown widget → set target date to —.
As your Mac screensaver
Download Plash (free, Mac App Store) — it sets a web page as your live desktop wallpaper.
That's it. Every time you wake your Mac, the count is on your desktop.
Prefer an actual screensaver? Install webscreen (free, GitHub — modern, lightweight) or WebViewScreenSaver → paste the URL above → System Settings → Screen Saver → pick the installed saver.
For a quiet desk-tab
Keep this page pinned in a browser tab. The number ticks every second whether you're looking or not.
Where the idea comes from. Kevin Kelly displays a days-remaining count on his personal site (kk.org) — he's said publicly that watching it tick changes how he chooses what to work on. Tim Urban's The Tail End visualizes a life in weeks (52 across, ~90 down) and was the first widely-shared version of "you have fewer ___ left than you think." Ryan Holiday's memento mori coin sits on millions of desks for the same reason. This page is a hybrid: Kelly's tick + Urban's grid + the Stoic aphorisms that have done this work for two thousand years. The Romans called it memento mori — remember you will die. Not as despair. As a question: knowing this, what do you spend your day on?