ld()
public
Returns the Lilian day number. This is a
whole number, which is adjusted by the offset as the local time.
Date .new (2001,2,3).ld #=> 152784
static VALUE
d_lite_ld(VALUE self)
{
get_d1(self);
return f_sub(m_real_local_jd(dat), INT2FIX(2299160));
}