Dorothy L. Sayers said this quote
“ Persons curious in chronology may, if they like, work out from what they already know of the Wimsey family that the action of the book takes place in 1935; but if they do, they must not be querulously indignant because the King's Jubilee is not mentioned, or because I have arranged the weather and the moon's changes to suit my own fancy. For, however realistic the background, the novelist's only native country is Cloud-Cuckooland, where they do but jest, poison in jest: no offence in the world. ”