need to get 15 years back date from datetime

Question

I have below 2 dates(yyyymmdd format) with which i have to work with

Date1: 2019-02-01
canceldate= 2004-02-28

 

Now i have select all the records for whome Dte1-canceldate>=15

 

i used DATEDIFF(YEAR,canceldate,Date1).

Using this command the above condition is satisfied considering difference in year. But actually canceldate 2004-02-28 <15 year and record with canceldate shud not have been selected.

 

Please let me know how can i correct the above issue