C
anniversary
annual holiday
bicentenary
biennial
birthday
bissextile day
cental
centare
centenarian
centenary
centennial
centennium
centigram
centimeter
centipede
centistere
centred
centref
centrev
centumvir
centumvirate
centurion
century
commemoration
cwt
decennial
diamond jubilee
golden wedding anniversary
gross
hecatomb
holy days
hundred
hundredweight
immovable feast
jubilee
leap year
long hundred
name day
natal day
octennial
one C
quadrennial
quasquicentennial
quincentenary
quincentennial
quinquennial
septennial
sesquicentenary
sesquicentennial
bicennaries
day of remembrance
250th
80th
Fourth of July
Yule
duringa
multi-solution
peekaboo
postgame
tercentenary
thenba
millennial
perennial
triennial