If the file is always the same i.e. "Historical Pipeline Export" etc, then you dont need to rename. Why don't you just give it the name you want in the Create File action. For the date portion, you can use the formatdatetime() function.
If the file is always different and you want the name to be dynamic i.e. the same as the file you receive but just change the date portion, you again dont need to rename the file. Just implement the logic others have suggested below and add it to your create file step in the filename field.