What are The Arabic Days of the Week?

What names do the week days go by in the middle east? Do they differ from country to country?

They’re not terribly exciting. The word for Sunday is the Arabic word for “the first” and they continue like that until Friday, which the “day of gathering.” Saturday picks up again with being “the seventh day.”
They do not differ from country to country, as long as the country is one where they speak Arabic.

Where can I go to find out how different cultures have divided up days into groups?

Example questions would include, are there cultures where the closest thing to a week lasts five days, or eight days, or whatever number you like?

Nothing deep here, I’m just looking for trivia.

-FrL-

From Wikipedia:

Frylock, I would start with the Wikipedia article on calendars. It links to articles about days, weeks, months, and years in various cultures in various times.