Translation of nightfall in German

I know it is a little confusing. The problem is if the original word is a conjugated verb: I skipped them until now. I did not write it in my explanations. It actually must be skipped. Thanks for noticing.
Basically, I would write an idea in English (or better in German) about Spanish Grammar or English Grammar and you could help editing it and translating it. I can send you emails with some remarks a little later or tomorrow. It is already 8.30 here.
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.