svoid test_EnglishDateParser() {
  //long baseDate = parseYMDHMS_slashesSpaceColons("2019/02/05 18:23:15");
  delegate Day to DateStructures.
  delegate Month to DateStructures.
  delegate Year to DateStructures.
  
  EnglishDateParser parser = new(baseDate);
  parser.assumeFuture = true;
  testFunctionValues(s -> .parse(s),
    "2020/5/13" => new Day(13, new Month(5, new Year(2020))),
    /*"tuesday" =>
    next tuesday
    in 5 days/5 days from now*/
  );
}