"Saturday is a day of fun."
Translation:Sábado é um dia de divertimento.
The names started to have "feira" in the 6th century, when the Catholic Church decided to abolish the pagan gods from the days of the week during the Holy Week (week before Easter). "Feira" comes from Latin "feria", meaning "rest" (since the Holy Week was not for working). So, the Sunday before Easter (Palm Sunday) used to be "prima-feira", Monday was "segunda-feira", Tuesday (Mardi Gras) was "terça-feira", etc. But then the names "stuck", except for Saturday and Sunday, which got their names from the Hebrew "shabbat" and the Latin "dominicus" (from Dies Dominicus or Day of the Lord).