AD 2004 / AUC 2757
was a leap-year and thus
the 21th Dec 2004 changes into a leapday and the 22e Dec into a season day.
Therefrom the 28th of Dec 2004 is not a seventh day
but that is so at the 29th Dec 2004
and so links 2004 up to the calender below of 2005
see also the BPCS-fields tablePrevious years
See for further info: the Full Calendar of Order-mainpage.