Why does it mention week? Can somebody tell me the logic of that? I mean it says, (To my understanding) "What day it is July the 7th?" is there any Japanese logic to it? For it to be translated as "What day of the week"? When there's no week kanji or whatsoever.
The Japanese is actually pretty specific because it asks 何曜日(なんようび) and days of the week have the form, ―曜日. Try not to be concerned about missing or added words unless it changes the meaning. After all, good translations aren't done via word replacement.