Festivus?

"Plum" also paid endless attention to detail. On display is a letter to the novelist Arnold Bennett, thanking him for his praise. "I can never see why printers should do their job so slackly," he writes. In Jeeves and the Yuletide Spirit, the story Bennett had admired, Bertie Wooster tells Jeeves that he has been invited somewhere for "the festive s" – it was a habit of Bertie's to substitute the initial letter for the whole word. The first edition rendered this as "festives". The American edition changed it to "festivities". The later Omnibus edition stuck in "Christmas" instead. It was not until 1999 that the Penguin edition fulfilled the author's intention. —Telelgraph

(Via Jenny)