Did you know that capital letters (letras maiúsculas) work a little bit different in English and Portuguese.
There are several words that you capitalize in English, which you often don’t in other languages.
The days of the week demonstrate this. In English, all seven days are capitalized. Just for review, here are the seven days.
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday until Friday are called weekdays.
Saturday and Sunday is the weekend!