Learning the days of the week is easy if you remember how to count from 1 to 5. Just remember that the first day of the week is Sunday.
Waaid 1 Ithnaan 2 Thalaatha 3 Arbaca 4 Khamsa 5
(Yawm) al-Aad Sunday (the first day) (Yawm) al-Ithnayn Monday (the second day) (Yawm) ath-Thulathaa' Tuesday (the third day) (Yawm) al-Arbicaa' Wednesday (the fourth day) (Yawm) al-Khamiis Thursday (the fifth day) (Yawm) al-Jumcah Friday (the day of coming together for prayer) (Yawm) as-Sabt Saturday (the Sabbath day)