PARIS – Christian Dior on Tuesday was the first major fashion house to stage a traditional ready-to-wear runway show in Paris since the coronavirus pandemic hit in March. The show headlined the first full day of a hybrid-style Paris Fashion Week. Guests were unusually relaxed, with some fashion editors commenting that it was because they had not just flown in, exhausted, from a week of covering Milan. Paris, like Milan, is trying to kick off an unusual fashion season for spring-summer 2021. Coperni put on the first runway show of Paris Fashion Week, atop the Montparnasse Tower skyscraper building.