Huh, way cool! One more thing, I had a date which i multiplied by the values in the envisionJS files to enter them in milliseconds so I could see it in time format (day: 864e5, month: 2592e6, year: 31556952e3) and it got plotted 1970 years and 1 month into the future. I offset that by subtracting 1970+1/12 years, but Jan 1970 seems like a library-specific subset - is that where the calendar starts?
Also, is it possible for the mousetracker to track the date as it is shown on the x-axis? For me it shows the number of milliseconds the date represents so I take the lesser of two evils and only show the y-coordinate.