Correct the Julian day number of 2013-01-01.
Correct the Julian day number of 2013-01-01.

This is still somewhat dubious as http://aa.usno.navy.mil/cgi-bin/aa_jdconv.pl?form=1&year=2013&month=1&day=1&era=1&hr=0&min=0&sec=0.0 shows the previous value for this date.

jwg4/calexicon,jwg4/qual