James Clerk Maxwell: Two remarkable dates

This article considers events in which great Scotchman J.C. Maxwell played principal role and the significance for the evolution of the world culture, which cannot be overestimated. There are two anniversaries in 2014: first, 150 years of the publication of his final work on the theory of the electromagnetic field, and second, 140 years of the organizing Cavendish Laboratory under his leadership, becoming the world centre of science. Questionable dates associated with these events are discussed.