In the United Kingdom, a Silver Jubilee is held in a monarch's 25th year (followed by a Golden Jubilee after 50 years). Queen Elizabeth II's silver jubilee was in 1977.
... deals with his life up to the time of his settlement at Königsberg. See Quabicker, Karl Rosenkranz (1899), and J Hutchison Stirling, The Secret of Hegel, part ...