A century on one page
One hundred rows of 52 weeks makes 5,200 boxes, the most this site prints on a single sheet. Centenarians are still uncommon, about 3 percent of newborn girls and 1 percent of boys in today's period table, but the number has grown every decade, and a 100-year grid is useful for people who want to plan long arcs: savings, a career that changes direction at 50, or the years they hope to spend with grandchildren.
Reading the grid
The decade gaps make it easy to see life in ten-year blocks. Most people find the middle of the page more striking than the bottom; 50 is exactly halfway down, and the rows on either side of it tend to be the most crowded with obligations.
Try shading the first 18 rows in one color as 'childhood', then mark the decades you consider your working life. Whatever is left is what you get to choose.
Printing
On letter paper the boxes are small, about 1.8 mm, so tabloid is recommended. If you have access to a large-format printer, save as PDF; the file is vector, so it scales to any size without blurring.