Cacher is the code snippet organizer for pro developers

data DateFormats(keep=DateString Informat);
  if prxmatch("/\d{4}[\/-]\d{1,2}[\/-]\d{1,2}/",DateString)
  /* 4 digits,dash or slash,1-2 digits,dash or slash,1-2 digits */
  then Informat="YYMMDD10.";
  else if prxmatch("/\d{1,2}[\/-]\d{1,2}[\/-]\d{4}/",DateString)
  /* 1-2 digits,dash or slash,1-2 digits,dash or slash,4 digits */
  then Informat="MMDDYY10.";
  else if prxmatch("/\d{1,2}\w{3}\d{4}/",DateString)
  /* 1-2 digits,3 letters,4 digits */
  then Informat="DATE9.";
  else Informat="unknown";
run;