Why count a life in weeks
Years feel endless. Weeks don't. Oliver Burkeman's Four Thousand Weeks is built on that shift in scale. Measured in weeks, an ordinary life fits on one printed page, and every box you fill in is gone. The point isn't dread. It's that a finite number makes priorities obvious in a way "someday" never does.
How to use the calendar
Print it, put it where you'll see it, and look at it when you're deciding what this week is for. One box is one week. You don't need to fill every box with something remarkable. You need the few that matter to go to the things you'll be glad you did, like the skill you could master or the books worth your remaining reading time.
Days, weeks and milestones
Your age in days passes a round thousand roughly every two and three-quarter years. The clock shows the date of your next one. Day 10,000 falls about four and a half months after your 27th birthday, which makes a better excuse for a review than most birthdays do.
Frequently asked
How many days old am I?
Count the days from your date of birth to today, including every leap day. Enter your date of birth above and the clock does it for you. For example, someone born on 1 January 1990 was 13,149 days old on 1 January 2026.
How many weeks are in a life?
About four thousand, the framing behind Oliver Burkeman's book Four Thousand Weeks. 4,000 weeks is about 76.7 years, and an 80-year life is about 4,174 weeks. Change the life length above to use your own number.
What is a memento mori calendar?
A grid with one box for every week of a life, with the weeks you've lived filled in. Memento mori is Latin for "remember that you will die". The point isn't gloom: seeing the weeks makes it easier to spend the next one on purpose. Print the grid on this page as a one-page calendar.
Is my date of birth saved or sent anywhere?
No. Everything is calculated in your browser. Your date of birth is never sent to a server, saved, or added to the page address.