Here are three centuries, where each dot is a day, each row a year.
2017 day 082 (Mar 23)
Caveats - I have ignored leap days (the 366th day of the years). Some 75 of them here.
I'm not sure if there has been a calendar correction in the last 200 years. If so, I've ignored it.
Reference 10^x hrs, n years of life, life expectancy (late 20thC devworld diet/tech)
Track mouse and show Y/M/D of current dot.
Provide click through to something like dMarie Time Capsule.
Not sure I like the boxes around the reference objects.
2001-Jul-20 Fixed a layout bug with the "10 years" square.