annulus calculation 1: http://i.imgur.com/NqBa4L7.jpg
annulus calculation 2: http://i.imgur.com/tlkBBOt.jpg
if you want to recalculate: http://convertxy.com/index.php/shapering/
both annuli with comments: http://i.imgur.com/vMj42f1.jpg

"numerical names" and the postal code / phone combination should be regarded as proof that the "corresponding" series in the chart which look as if they display calendar dates, really are a display of calendar dates.

how is that coincidence possible (the consistency of the encircled series in the chart with the data next to it)?

how can geometry calculations display dates in a format that was first introduced in 1582?

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