translations101:

Days of the week in Japanese

Monday: 月曜日 (getsuyōbi)

Tuesday:火曜日(kayōbi)

Wednesday:水曜日(suiyōbi)

Thursday:木曜日(mokuyōbi)

Friday:金曜日(kinyōbi)

Saturday:土曜日(doyōbi)

Sunday:日曜日(nichiyōbi)

Weekday: 平日 (heijitsu)

Weekend: 週末 (shūmatsu)