1. (a.) Relating to a period of a hundred years\.

2. (a.) Occurring once in every hundred years; centennial.

3. (n.) The aggregate of a hundred single things; specifically, a century.

4. (n.) A commemoration or celebration of an event which occurred a hundred years before.

Admission Day Arbor Day Armed Forces Day Armistice Day Army Day Bastille Day Colorado Day Constitution Day Decoration Day Dewali Discovery Day Double Ten Easter Monday Election Day Empire Day Evacuation Day Flag Day Foundation Day Fourth of July Groundhog Day Halifax Day Halloween Holi Ides of March Kuhio Day Labor Day Lenin Memorial Day Loyalty Day Maryland Day May Day Mecklenburg Day Memorial Day Midsummer Day National Aviation Day Navy Day Nevada Day Pan American Day Pascua Florida Day Pioneer Day Remembrance Day Roosevelt Day State Day Texas Independence Day United Nations Day V-E Day Victory Day West Virginia Day Wyoming Day anniversaries annual holiday bicentenary bicentennial biennial birthday bissextile day celebrating celebration centenary centennial ceremony commemoration decennial diamond jubilee dressing ship fanfare fanfaronade festivity flourish of trumpets golden wedding anniversary holiday holy days immovable feast jubilee leap year marking the occasion memorialization memory name day natal day observance octennial ovation quadrennial quasquicentennial quincentenary quincentennial quinquennial rejoicing religious rites remembrance revel rite ritual observance salute salvo septennial sesquicentennial sextennial silver wedding anniversary solemn observance solemnization tercentenary tercentennial testimonial testimonial banquet testimonial dinner toast tribute tricennial triennial triumph wedding anniversary