In Korean the names of the days of the week are simple to memorize and the word structure works just like english. The word for day in korean is Yoil (Yo-eel) and just like english the word day goes at the end of the word. Example: Monday. So in korean its the same thing. Example: Wolyoil.
Sunday—Ilyoil (Eel-yoh-eel) Sound clip
Monday—Wolyoil (Wole-yoh-eel) Sound clip
Tuesday—Hwayoil (Wha-yoh-eel) Sound clip
Wednesday—Suyoil (Suu-yoh-eel) Sound clip
Thursday—Mokyoil (Mo-kyoh-eel) Sound clip
Friday—Kumyoil (Kume-yoh-eel) Sound clip
Saturday—Toyoil (Toe-yoh-eel) Sound clip