It's a load of disconnected sentences. Most of which are correct, but there's no flow. For example the first two sentences would be better as one.
Winter holidays were wonderful, a lot of interesting things happened.
This is wrong.
In the evening, I was sitting at the computer.
In the evening, I sat at at the computer.
In the evening, I was sitting at the computer when.....
I was invited to a New Year's Eve.
A New Year's Eve what, party, ball, séance?
Overall if you just had to write a series of sentences you've done it. If you had to include some sort of narrative, you've not. You described the New Year's Eve party
as fun. Then you talk about breakfast, whether it's before or after the party remains a mystery. Then you've got a sentence about sitting on the computer. It's all over the place.
Stick to the party. Who invited you? Where was it? How did you get there? Who did you talk to? Was there food, drink music? What happened?
If you do that you've got some form of narrative.