One of my favourite books is The Lost Weekend, which I thoroughly recommend to anyone who isn't an addict and wants to know what addiction feels like.

The best chapter describes how the protagonist, Don Birnam, staggers up 2nd Avenue in Manhattan, desperately trying to find a pawnshop at which he can convert his typewriter into whisky money. But they're all closed: and after an epic journey he realises that this is because it's Yom Kippur (presumably it was a given that all pawnshops were run by Jewish people in that time and place).

However, the action of the novel is stated to take place in early October 1936 (either from Thursday 1st-Tuesday 6th, or Thursday 8th-Tuesday 13th). But I have it on good authority that Yom Kippur fell on September 26th in 1936.

(Don manages to stagger back home again down 1st Avenue. In the end he borrows the money from the supermarket manager).