Verb conjugation of "number" 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.
I usually do not travel, and if I do, then only to England, when I visit my parents who live in a suburb of London. I can not afford to travel too much, because it is a very large expense.
What do you think of the current situation? Like you, I am writing letters, emails and other messages. Tomorrow I will leave, then I will go to my friend in Spain, where we are planing a beach vacation.