The simplest life calendar
Ninety boxes, ten to a row, one row per decade. Each box is a year of age. It is the least detailed version and often the most affecting, because you can take in the whole page in one glance and count the remaining boxes without trying.
Because the boxes are large, you can write a word in each year as it ends: a place, a person, a theme. After a few years the page becomes a very short autobiography.
Ideas for using it
Use it as an annual review page: on each birthday, fill in the box and write one word for the year just finished. Couples sometimes print two and keep them side by side. Teachers use the yearly grid with students because it is easy to understand at any age.
For a combined view, print this alongside the weekly calendar: the yearly grid shows the shape of a life, the weekly one shows its texture.
Printing
Letter paper is plenty. The decade numbers run down the left, and the column numbers across the top show the year within each decade.
Other templates
90 years in weeks
The classic: 90 rows of 52 weeks, 4,680 boxes on one page.
80 years in weeks
4,160 boxes. Close to today's average life span, so slightly larger boxes.
100 years in weeks
A full century: 5,200 boxes for the optimists and the planners.
Life in months
1,080 boxes, two years per row. Big enough to write in.