The angels who have authority over the seven days of the week-in much the same fashion as there are angels presiding over the planets, hours of the day, and months of the year.
The angels give their particular day their special attention and in legend can be invoked to assist a person in some endeavor or need. The angels and their days are reported in The Magus (1801) by Francis Barrett:
Sunday – Michael
Monday – Gabriel
Tuesday – Camael
Wednesday – Raphael
Thursday – Sachiel
Friday – Anael
Saturday – Cassiel