Verb conjugation of "summen" in German

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.
How is the weather in Hamburg? We have 15 degrees and some sunshine here in the south. I have some remarks on your mail. If you write again and if you wish, I can correct your spelling mistakes.
I live in the center of Rome, but I prefer the outskirts. I don't love the center but the old part of the city is very charming. There are however a lot of advantages in the city, especially for young people.