Dear M. Greetings from Islamicity's Imam. The Arabic names for the days of the week are: 1-Saturday : Sabt, 2-Sunday : Ahad, 3-Monday : Ithnayn, 4-Tuesday : Thulathaa', 5-Wednesday : Arbi'aa', 6-Thursday : Khamis, and 7-Friday : Jumua. As to your second question, yes the Islamic week is similar to the regular week: it contains seven days. Thank you for asking and God knows best. (Source: IslamiCity) Classified in Arabic > Names for the Days of the Week