Many words that are capitalized in English are not capitalized in Italian. These include: the days of the week, the months of the year, proper adjectives, a few proper nouns, and titles such as Mr., Mrs., and Miss.
Arriva domenica. He is arriving on Sunday.
Il signor Neri è italiano. Mr. Neri is Italian.
Gli americani sono industriosi. Americans are industrious.
The apostrophe (l十一选五新疆十一选五