This is very unlike the previous years, when we celebrated with mythe whole family.

This would just be more proper, as the repetition of "my" is unnecessary.

I wanted to tell you how Christmas usually goeis for us.

While I'm an atheist, but my family is religious and I still enjoy the celebration (and the presents).

We usually spend the 24th with one side of the family and the 25th with the other to. We usually have thave leftovers with them.

This should be a separate sentence, since it is a separate thought.

We gather at someone's house in the late afternoon or in the evening for(since you had two sides of the family in the previous sentence, you need to re-state who "someone" is) house in the late afternoon or on Christmas Eve night.

Everyone brings something to eat and the presents.

Of course, the presents are hidden, so that the children will believe in the magic of Christmas.

We have dinner and, afterwards, we have coffee and sweet things until it's midnight and we. We then raise our glasses to say "Happy Christmas"."

These changes just make it sound more natural.

Someone usually makes a funny toast, too.

Then, we seewatch the fireworks.

It is always "watch" fireworks, not "see."

At some point, the gifts "magically" appear under the Christmas tree (the fireworks are a pretty good distraction) and we open them.

We usually stay up until three or four in the morning.

Also, sSome teenagers and young adults in my family go to parties or to the park after midnight to get drunk and celebrate.