When was the last time a Tommy Hilfiger pole or a Calvin Klein T-shirt went down at an outlet price without having to wait for January? Exactly: few.The Prime Day has that particularity. For a few days a year, brands that do not usually move from their price stretch are put within reach of those who have been waiting for the moment for months. This year, the last push of the campaign leaves on Amazon clothes from Helly Hansen, Tommy Hilfiger and…