How do the seasons work? Fashion Week is always one season ahead: the Spring/Summer collection is presented in September or October and the Fall/Winter collection in February/March, available to shop six months after appearing on the catwalk. Over the past few years, this rhythm has been revolutionized by the see-now, buy-now movement, a practice adopted by fashion houses from Burberry to Tommy Hilfiger, whose collections are available to shop immediately after the show.