Synonyms and related words :
anniversary, annual holiday, bicentenary, bicentennial, biennial, birthday, bissextile day, centenary, centennial, commemoration, decennial, diamond jubilee, golden wedding anniversary, holy days, immovable feast, jubilee, leap year, natal day, octennial, quadrennial, quasquicentennial, quincentenary, quincentennial, quinquennial, septennial, sesquicentennial, sextennial, silver wedding anniversary, tercentenary, tercentennial, tricennial, triennial, wedding anniversary