If "date created" is after September 13

I want only current records to show in a view. There doesn’t seem to be a way to filter for “date created after dateX”, so I figure I can create a field that says “yes” if the date created is after whatever date I put in, then filter on that field. But what would be the formula for saying, "If ‘date created’ is after September 13, “yes”, “no”)?

Thanks!