National Overcoat Day should be a thing. Falling some time in October, it would mark your wardrobe’s annual style upgrade, with your new overcoat elevating outfit after outfit until Spring. If towels have a national holiday then overcoats, for all of their tailored beauty and functional warmth, should definitely be rewarded with one as well. While we wait for the announcement, there’s no better way to celebrate the crown jewel of your fall/winter style than with an editorial to match.…