My good day was today

I had a good (great, fantastic, interesting) day today  

Why was my day wonderful ?

Because when I was in my college I receive the better notice that notice was that I will pass the next semester.

Beacause when I was in college (no need for my - it doesn't belong to you) I received (received not receive) notice that I will pass the next semeseter. 

I was very happy because I pass the eighth semester without lost any subject before that a man called me and said me. Are you Gaby ? I said yes. I am ..... To be continue

I was very happy because I will (add will) pass the eighth semester without losing (not lost) any subjects (add 's' for plural - more than one subject).

Full stop and capital for new sentance 

Before that a man called me and said (no need for me) (add quotation mark 'Are you Gaby?' I said 'yes, (comma not full stop) I am.'

I hope this helps a little :-)

To be continue......