Verb conjugation of "decrease" in English

Now I just got scared! Have I missed my own son's birthday? Luckily it is on the 19.08, exactly in a month. Man, you confused me now. Anyway, we had a great time in the mountains and the snow was great.
On the frozen lake, you can skate, but I would never dare it because it is far too dangerous. Who knows how thick the ice really is and how accurate the measurements are. It can break.
I live near London. In March I will be going to Italy to visit friends. It will be my first time in Italy, I am totally excited. See you soon hopefully. Lovely greetings and best wishes. Anne.