xkcd: Calendar of meaningful dates by Nathan Yau.
From the post:
Using the Google ngrams corpus, xkcd sized the days of the year based on usage volume. Lots of firsts of the month and September 11th.
Interesting presentation of date usage in English language books since 2000.
Suggestive though of other applications.
Such as plotting the number of sick days taken by particular departments? Or on what day of the week?
Thinking product releases scheduled for when staff isn’t getting sick or caught up after being out.
Calendars are familiar objects and for some types of data, might make a useful mapping target/interface.