https://www.jwfacts.com/pdf/the-kingdom-that-never-came-joseph-wilting.pdf A document that talks about 1954.
Or check this quote: This time can be called “Jehovah‟s day” because it is the day when he fights for his name. Already forty years of this generation that is doomed to feel the wrath of Jehovah‟s day have passed. Only a few years remain. In the most urgent sense, then, “the day of Jehovah is near upon all the nations.” (The Watchtower October 15, 1954, p. 615).