new_by_frags

# File lib/date.rb, line 1018
  def self.new_by_frags(elem, sg) # :nodoc:
    elem = rewrite_frags(elem)
    elem = complete_frags(elem)
    unless jd = valid_date_frags?(elem, sg)
      raise ArgumentError, 'invalid date'
    end
    new!(jd_to_ajd(jd, 0, 0), 0, sg)
  end