'Un anniversaire' is most frequently used as a singular, since you usually celebrate one at a time. The plural is 'des anniversaires'.
The plural of anniversary is anniversaries.
The plural form of the noun anniversary is anniversaries.The plural form of the church's anniversary is the church's anniversaries.The plural form of the noun church is churches.The plural possessive form is churches'.The plural form of church's anniversary is the churches' anniversaries.
Happy Anniversary in French is "Joyeux anniversaire"
The plural of anniversary is anniversaries.
'en vacances' (always plural)
les vacances (always plural)
"les vacances" (always plural)
Enterrement, funérailles (this second one is always plural)
"devoirs""les devoirs" (always plural)
data is spelled 'des données' (fem., nearly always plural) in French.
the ninth anniversary is translated 'le neuvième anniversaire' in French.
The Eiffel Tower was built for the 100th anniversary on the French Revolution.