Can't Convert Num to Char and Add Leading Zeros

[raivester]

I am attempting to take the number of days between a start date (January 1, 2019) and an end date (January 1, 2019 + some length of time) and calculate and concatenate the two-digit number of years, months, and days. For example, a time period of 440 days is 1 year, 2 months and 15 days--the resultant number I would expect to get in the "duration" variable would be: 010215. I attempt this by running the following, but the month variable does not convert to character. Any ideas?

data out;
  set in;
  	length duration $6

	** create an end date variable to calculate years, days, and months between Jan 1 2019 and end date based on total days;
	date_end = "1JAN2019"d+total_days;

	yr    = put(intck('year',"1JAN2019"d,date_end,'c'), z2.);
	mntha = intck('month',intnx('year',"1JAN2019"d,yr,'s'),date_end,'c');
	daya  = date_end - intnx('month',"1JAN2019"d,mnth+yr*12,'s');

        *Since I perform this operation below, I had to keep the temp month and day variables
         numeric--I will change them to character with leading zeros after. Since I do not use
         the year variable here, I converted this to char with leading zeros in the variable's
         creation, above.;
	if daya=30 then do;
		mntha+1;
		daya=0;
	end;

	mnth = put(mntha, z2.);
	day  = put(daya, z2.);
	
	duration=cats(yr,mnth,day);

run;

[Reeza · Accepted solution]

daya = date_end - intnx('month',"1JAN2019"d,mnth+yr*12,'s');

Should that mth be mntha?
Or does that mnth exist in data set already?

[raivester]

OH gosh! That's embarrassing! Thank you for catching that. I guess I have been staring too long--should have walked away and come back.