Various legends suggest that there are angels assigned to each day of the week. Some believe that angels of the week can be called upon for assistance during their respective day of serving. Below is a listing of the chief angels traditionally ascribed to each day from magical lore:
Angels of the Days are listed below.
Sunday: Michael
Monday: Gabriel
Tuesday: Samael
Wednesday: Raphael
Thursday: Sachiel
Friday: Anael
Saturday: Cassiel
Source: The Encyclopedia of Angels by Rosemary Ellen Guiley
Also see:
Angels of the Hours
Angels of the Months
Angels of the Seasons
Angels of the Planets