"PARTY-TIME!" or "LET'S GET THIS PARTY STARTED!!" :)
We're having a party (we're enjoying ourselves)
we are going to the party
The full and correct expression is 'le monde est à la fete' which means the whole world is rejoicing
Music Festival.
c'est la première - it's the first (feminine)
Christmas time at home
La date de la fete des peres
Either the ballet celebration or the ballet festival
La fete du citron is something.
"Quelle est la date de ta fete?" translates to "What is the date of your celebration?" in English.
I don't recognise this. It looks and sounds very like c'est la notre. That means 'this is ours.'
"It's not a holiday for everyone".
Literally - So, it is the festival. Actually - All the fun of the fair.