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Noun1.quatercentennial - the 400th anniversary (or the celebration of it)
anniversary, day of remembrance - the date on which an event occurred in some previous year (or the celebration of it)
References in periodicals archive ?
These include establishing a dedicated group of Walls living history performers, providing accessible information for visitors, researchers and schools; producing a detailed book on the Walls and supporting the delivery of the 2014 Walls quatercentennial event in August 2014.
IN RESPONSE TO the "Flight of the Earls quatercentennial, Liam Swords has written a book for the popular" reading public.
The quatercentennial celebrations of the death of St John of the Cross in 1991 have already given rise to large number of publications.