(n.) Bissextile; a year containing 366 days; every fourth year which leaps over a day more than a common year, giving to February twenty-nine days. See Bissextile.

abundant year academic year anniversary annual holiday annum bicentenary bicentennial biennial birthday bissextile day bissextile year calendar month calendar year centenary centennial century commemoration common year day decade decennary decennial decennium defective year diamond jubilee fiscal year fortnight golden wedding anniversary holy days hour immovable feast jubilee lunar month lunar year lunation luster lustrum man-hour microsecond millennium millisecond minute moment month moon name day natal day octennial quadrennial quarter quasquicentennial quincentenary quincentennial quinquennial quinquennium regular year second semester septennial sesquicentennial session sextennial sidereal year silver wedding anniversary solar year sun tercentenary tercentennial term tricennial triennial trimester twelvemonth wedding anniversary week weekday year