julian?()
Retruns true if the date is before the day of calendar reform.
For example:
Date.new(1582,10,15).julian? #=> false (Date.new(1582,10,15) - 1).julian? #=> true
static VALUE d_lite_julian_p(VALUE self) { get_d1(self); return f_boolcast(m_julian_p(dat)); }