time-1.2.0.2: test/TestCalendars.ref

 == MJD -678576 == Gregorian 0000-12-31 == Julian 0001-01-02 == ISO 8601 0000-W52-7
 == MJD -38780 == Gregorian 1752-09-13 == Julian 1752-09-02 == ISO 8601 1752-W37-3
 == MJD -38779 == Gregorian 1752-09-14 == Julian 1752-09-03 == ISO 8601 1752-W37-4
 == MJD 53393 == Gregorian 2005-01-23 == Julian 2005-01-10 == ISO 8601 2005-W03-7