We christians need a Baptism of water and spirit for salvation.
The Christmas day and other festivity is a Baptism of water...
The Baptism of water(John the Baptist....) is more important, without it we cannot be called christians because Jesus said "If one loves me then follows my commandments" and a festivity means
our love in Jesus Christ!
This festivity remembers how Jesus Christ birth was in the Gospel of Luke, pratically it's our festivity...........