The New Dictionary of Cultural Literacy, Third Edition. 2002.
annus mirabilis
(AN-uhs mi-RAB-uh-lis) A Latin expression meaning miraculous year. The term refers to a year in which an unusual number of remarkable things occurred: The Waste Land and Ulysses both appeared in 1922, the annus mirabilis of modern literature.
The reverse is an annus horribilus, or terrible year. Queen Elizabeth II used the term in 1992, referring to a major fire at Windsor Castle and the widely publicized marital problems of her family members.