A weekday or workday is any day of the working week. In most of the Western world, it is Monday to Friday. So, the weekend is Saturday and Sunday.
Jewish Shabbat lasts from sunset on Friday to the fall of full darkness on Saturday. As a result, the weekend in Israel is observed on Friday–Saturday.
Some Muslim-majority countries had a Thursday–Friday or Friday–Saturday weekend. However, many such countries have shifted from Thursday–Friday to Friday–Saturday, or to Saturday–Sunday.
Let’s go on a trip this weekend ….