annus mirabilis (n.)

1667, Latin, literally "wonderful year, year of wonders," title of a publication by Dryden, with reference to 1666, which was a year of calamities in London (plague, fire, war), but they were overcome and the nation scored important military victories in the war against the Dutch. From annus "year" (see annual (adj.)) + mirabilis "wonderful, marvelous, extraordinary; strange, singular" (see marvel (n.)).