trigintennialadj.
rare.
Taking place once in thirty years.
ΘΚΠ
the world > time > period > year > [adjective] > occurring every specific number of years
quinquennal1532
quinquennial1601
five-yearly1619
centenary1620
septennial1640
triannual1640
triennial1642
septennary1644
sexennial1646
trieterical1646
novennial1656
octennial1656
trieteric1656
quinquennalian1692
quadrenniala1700
biennial1750
sexennary1753
lustral1781
centennial1797
quaternal1813
sextennial1814
septendecennial1834
septemdecenary1843
undecennarya1847
bicentenary1862
bicentennial1883
quadricentennial1889
trigintennial1894
twelve-yearly1906
vigintennial1921
1894 Yale News (New Haven, Connecticut) 29 June About twenty-five members of the class were present at their trigintennial reunion.
This entry has not yet been fully updated (first published 1914; most recently modified version published online June 2021).
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adj.1894