Converting numeric to date

[Joefrancis99]

I'm trying to use the intnx function to define someone's end date on a promotional offer. The start date variable that I'm reading is numeric so the calculation works, however it's not reading in the dates how I want to. For example, a value in my start date variable is 201707, which I want to read in as July 2017. However, it's giving me the month equivalent of what that number represents, so 251204 (April 2512). How can i read the number in as the corresponding month?

data test;
set month_calc (keep=campaign_YYYYMM bt_duration vintage);
campaign_YYYYMM2 = campaign_YYYYMM;
format campaign_YYYYMM2 yymmn.;
bt_expiry_month = intnx('month',campaign_YYYYMM2,bt_duration);
format bt_expiry_month yymmn.;
run;

[unison · Accepted solution]

Convert your numeric yyyymm start_date to a SAS date with format yymmn6. Then you can apply intnx in the way you want:

data have;
input start_date;
datalines;
201707
;
run;

data want;
set have;
format start_date_as_date end_date yymmn6.;
start_date_as_date = input(put(start_date,z6.),yymmn6.);
end_date = intnx('month',start_date_as_date,1,'s');
run;

So to apply to your example:

data test;
	set month_calc (keep=campaign_YYYYMM bt_duration vintage);
	format campaign_YYYYMM2 bt_expiry_month yymmn6.;
	campaign_YYYYMM2=input(put(campaign_YYYYMM, z6.), yymmn6.);
	bt_expiry_month=intnx('month', campaign_YYYYMM2, bt_duration, 's');
run;

[Joefrancis99]

Perfect, thanks a lot!