_load

# File lib/date.rb, line 1389
  def self._load(str)
    a = Marshal.load(str)
    if a.size == 2
      ajd,     sg = a
           of = 0
      ajd -= 1.to_r/2
    else
      ajd, of, sg = a
    end
    new!(ajd, of, sg)
  end