TIL: y is not Y is not year, like you'd think
unicode date format patterns are a little more nuanced than the “standard” strftime() supported formats. note the difference between the following: man strftime (linux) %y The year as a decimal number without a century (range 00 to 99). (Calculated from tm_year) %Y The year as a decimal number including the century. (Calculated from tm_year) man strftime (osx) %Y is replaced by the year with century as a decimal number. %y is replaced by the year without century as a decimal number (00-99)....