I assume you mean without loading cal-china-plus, the follow restults
still stand. Could you investigate more and report those bugs to
emacs-devel? The author of calendar.el is actually an expert in this
field, it is good to have him reviewing this.
1. The calculation of Chinese year is not right.
For example, if I born in 1982.11 of *solar* calendar and my father born
in 1952.12 of *lunar* calendar. My age is calculated as 27 and my father's
age is calculated as 58, which should be 57. Because my father's birthday
is in the next year of *solar* calender, his age is calculated one year
more.