https://communities.sas.com/t5/SAS-Programming/Date-Informat-Help/m-p/16025#M2210 have a look at informat YYMMDD Thu, 12 Nov 2009 17:43:17 GMT Peter_C 2009-11-12T17:43:17Z https://communities.sas.com/t5/SAS-Programming/Date-Informat-Help/m-p/16024#M2209 This is what the data looks like in my first column called DATE: "2009-11-09". I have the informat set at 10. I've tried SAS informats mmddyy10. and others and it still gives me invalid data warning. Thu, 12 Nov 2009 17:32:26 GMT https://communities.sas.com/t5/SAS-Programming/Date-Informat-Help/m-p/16024#M2209 chandler 2009-11-12T17:32:26Z https://communities.sas.com/t5/SAS-Programming/Date-Informat-Help/m-p/16025#M2210 have a look at informat YYMMDD Thu, 12 Nov 2009 17:43:17 GMT https://communities.sas.com/t5/SAS-Programming/Date-Informat-Help/m-p/16025#M2210 Peter_C 2009-11-12T17:43:17Z https://communities.sas.com/t5/SAS-Programming/Date-Informat-Help/m-p/16026#M2211 try anydtdte10. informat. Thu, 12 Nov 2009 17:46:35 GMT https://communities.sas.com/t5/SAS-Programming/Date-Informat-Help/m-p/16026#M2211 Flip 2009-11-12T17:46:35Z https://communities.sas.com/t5/SAS-Programming/Date-Informat-Help/m-p/16027#M2212 Hi.<BR /> <BR /> Assuming '2009-11-09' represents Day=09 Month=11 and Year=2009<BR /> <BR /> mmddyy10. is precisely the opposite, and would only work for '11-09-2009'.<BR /> <BR /> Since your date is reversed, you should try yymmdd10. instead.<BR /> <BR /> Cheers from Portugal.<BR /> <BR /> Daniel Santos @ <A href="http://www.cgd.pt" target="_blank">www.cgd.pt</A> Fri, 13 Nov 2009 08:36:12 GMT https://communities.sas.com/t5/SAS-Programming/Date-Informat-Help/m-p/16027#M2212 DanielSantos 2009-11-13T08:36:12Z