# File lib/xsd/datatypes.rb, line 561
  def screen_data(t)
    # convert t to a DateTime as an internal representation.
    if t.respond_to?(:to_datetime)      # 1.9 or later
      t.to_datetime
    elsif t.is_a?(DateTime)
      t
    elsif t.is_a?(Date)
      t = screen_data_str(t)
      t <<= 12 if t.year < 0
      t
    elsif t.is_a?(Time)
      jd = DateTime.civil_to_jd(t.year, t.mon, t.mday, DateTime::ITALY)
      fr = DateTime.time_to_day_fraction(t.hour, t.min, [t.sec, 59].min) +
        t.usec.to_r / 1000000 / SecInDay
      of = t.utc_offset.to_r / SecInDay
      DateTime.new0(DateTime.jd_to_ajd(jd, fr, of), of, DateTime::ITALY)
    else
      screen_data_str(t)
    end
  end