• The word boundary check supposedly added in 1.67 didn't really work
  properly, and still matched too much. For example, the pattern "%d-%m-%y"
  would match "2016-11-30" and turn it into November 16, 2030. This also had
  problems at the end of strings, so that the same pattern would improperly
  match "30-11-2016" as November 30, 2020. Reported by Erik Huelsmann. GitHub
  #11.