The Memento Mori Calendar: How to Use 'Remember You Will Die' Well

An old idea in a new format

Reminders of mortality show up across cultures and centuries. Roman generals were said to have a servant whisper reminders of their mortality during triumphal parades. Stoic philosophers, especially Seneca, Epictetus, and Marcus Aurelius, returned again and again to the shortness of life, not to make their readers miserable but to make them pay attention. Seneca's essay on the shortness of life argues that life is long enough if you use it well; the problem is that people spend it as if they had an unlimited supply.

In European art, the memento mori became a genre of its own: skulls, hourglasses, wilting flowers, and guttering candles placed in still-life paintings. They were visual arguments, meant to be looked at every day.

A memento mori calendar is the same argument in a more modern language. Instead of a symbol, it uses a count. Instead of 'life is short,' it says 'this is roughly how many weeks a long life holds, and this is how many you have used.'

Why a calendar works better than a symbol

A skull is easy to stop seeing. A page of boxes that changes every week is harder to ignore, especially if you are the one shading it. The calendar also answers a question the symbol does not: how much time, roughly, is left? That makes it practical. You can look at the empty boxes and decide what deserves them.

There is also a comfort in the format that surprises people. The full page is large. Even at 50, a 90-year calendar still has 2,000 empty boxes, and each one is a whole week: seven days, dozens of meals, a weekend. Seen that way, the calendar argues against despair as much as against complacency.

How to use one without it becoming morbid

• Pair it with a weekly ritual. Shade the box on Sunday evening and ask one question: what made this week worth having? The habit keeps the focus on living, not on the countdown.
• Color the good things. Add chapters for the people, places, and work you care about. A calendar full of color reads as a record of a life, not a ledger of loss.
• Choose a generous span. Use a 90- or 100-year grid rather than an average. The point is perspective, and an honest upper bound gives you room.
• Do not do arithmetic on yourself. Life tables describe populations. Your own health, habits, family history, and luck matter far more than any average.
• Put it where you will see it briefly, not constantly. A hallway or the inside of a closet door works better than the wall above your desk.

What people actually change

The most common response to a memento mori calendar is not a dramatic life change. It is a series of small reallocations. People call a parent more often after realizing how few visits a year adds up to over the rows that remain. They start the project that kept being postponed to 'next year,' because next year is just one row. They stop spending weekends on things they neither enjoy nor need.

One useful exercise is to count the boxes for something specific. If you see your parents twice a year and they are in their seventies, the number of remaining visits may be in the dozens, not the hundreds. If your children are eight and you have them at home until 18, you have about 520 weeks of them under your roof. These are not sad numbers; they are useful ones.

When it is not the right tool

For some people, especially those dealing with grief, illness, or anxiety about health, a visual countdown can be distressing rather than motivating. That is a perfectly good reason not to use one. A life calendar is a perspective tool, and the right perspective at a hard time may be a much shorter horizon: this week, this day. If thinking about mortality is causing you real distress, please talk to someone you trust or a health professional.

Making yours

The interactive calendar on our home page fills in your weeks from your birth date, lets you color chapters, and prints as a clean one-page poster. If you would rather shade it by hand, which many people prefer for the ritual, print a blank 90-year calendar. For the numbers behind the boxes, see Statistical Life Left.