Linux, clean stuff. Cool in 1993 and still useful today.

Looking for info on time series ?
or maybe the Time2 Library project ?
or the CrNiCKL (chronicle) project ?
or Jean-Paul's website, blog, repositories, tweets ?
or the Hauser Olsson website ?
or the Date Difference Service ?
or what else?

Why make it complicated ...
Historic route 4.2 ...
Marcel Proust's notebook with outcropping windows ...