Early English Text Society 1995. ISBN 978-0-19-722416-8. ↑ Werner Rolevinck, Fasciculus temporum. ↑ While it is increasingly common to place AD after a date by analogy to the use of BC, formal English usage adheres to the traditional practice of placing the abbreviation before the year as in Latin (e.g., 100 BC, but AD 100). ↑ V. Grumel, La chronologie (1958), page 30. ↑ Richards, E. G. (2013).