Hi Okezie,

It depends on the context ...

This question was about how to say- late, early, on time. In this context you cannot say in advance.

En avance can actually mean: early, ahead of time, and in advance 

For instance, 

Nous prenons les paiements en avance = We take payments in advance

Les réservations doivent être faites en avance = Bookings have to be made in advance

Hope this helps!