Draw Memento Mori Calendar

Latin for “remember [that] you must die.” A Stoic philosophical practice (Marcus Aurelius, Seneca, Epictetus): regularly contemplating mortality not as morbid fascination but as a focusing mechanism. The intuition: knowing time is finite clarifies what’s worth doing. Roman legend has a slave whispering “memento mori” to victorious generals during triumphal parades to keep them humble. Modern revival via Stoicism (Ryan Holiday, Tim Ferriss) and life-in-weeks visualisations.

Tim Urban writes the long-form blog Wait But Why. In 2014 he published “Your Life In Weeks” – an essay illustrating an 80-year life as a 52×80 grid of 4,160 boxes. The post went viral and popularised the format. Urban’s broader project includes the Procrastination Matrix, the AI alignment series, and “What’s Our Problem?” book. He didn’t invent the format (life-in-weeks grids appear in earlier productivity literature) but his essay reached the mainstream.

A calendar year has 52 full weeks plus 1 extra day (or 2 in leap years). Tim Urban’s convention rounds to 52 boxes per year for clean visual grids. Strictly accurate would be 52.1775 weeks per year on average (so a 4,160-box grid represents 79.7 calendar years, not exactly 80). The small undercounting accumulates – by year 80 you’ve actually lived ~14 weeks more than the grid shows. We accept this convention because the visual benefits outweigh the precision.

The tool computes (now - birthdate) / 1 week and floors to the nearest week. So if you were born on a Tuesday and today is Thursday, you’re 0 weeks into the current “week” – boxed in. The 52-week-per-year approximation also drifts (~14 weeks per 80 years). For the philosophical purpose (intuiting “weeks left”), close enough. For surgical precision, no calendar visualisation can capture leap years and timezone changes exactly.

World median (UN 2024): 73.4 years. US: 78.4. UK: 81.7. Japan: 84.0. Switzerland: 84.0. Some countries are below 60 (war, healthcare, sanitation). YOUR expected lifespan depends on country + gender (women live ~5y longer everywhere) + lifestyle (smoking, drinking, exercise, diet, social connections) + genetics (longevity-correlated genes) + healthcare access. For the GRID purpose, use a number that feels honest – 75 if pessimistic, 85 if average, 95 if you think you’ll be the rare exception. Adjust as you reflect.

That’s the point. The Stoic argument: a number you can hold in your head (“I have about 1,800 weeks left”) shifts decision-making in a way an abstract “decades” never does. People report it changes how they say yes/no to commitments, how they spend weekends, and what they tolerate in jobs and relationships. If it triggers genuine anxiety (panic attacks, depression), step back – the practice is meant for contemplative focus, not pathological rumination. Counterbalance with present-moment practices (meditation, gratitude journaling).

Memento vivere: “remember [that] you must live.” Coined as a counterpoint to memento mori. Same logic but flipped: instead of contemplating death’s certainty, contemplate life’s improbability and beauty. The two are usually paired in Stoic and contemporary practice – memento mori for clarity about scarcity, memento vivere for joy in the abundance you DO have. Both anchor against “someday” thinking.

SVG is vector – scales to any size without pixelation. Best for printing the calendar large (a poster, a fridge-magnet), embedding in vector graphics tools (Illustrator, Inkscape), or HTML pages. PNG is raster – fixed pixel dimensions but supported everywhere. Best for sharing on social media (Twitter/X auto-converts SVG to PNG anyway), embedding in slide decks (PowerPoint/Keynote), or any context that doesn’t render SVG. We offer both; pick by use case.

Yes – 100% client-side. The date stays in your browser’s memory and gets passed to the date-arithmetic functions in logic.js. No network requests. Verify via your browser’s Network tab – only the initial HTML/CSS/JS load happens, no XHR/fetch. The downloaded SVG/PNG includes the grid pattern (which encodes your birthdate indirectly via the “current week” position) – if you share the file publicly, someone could roughly reverse-engineer the birthdate. So treat the downloaded file like personal data.