Monday is named for the Moon. In Latin “dies lunae” means day of the Moon. The Old English term for this is, “monandaeg”, which is where we get Monday from. In China, Japan, and Korea, Monday is “Wan Jan”…the Moon’s day.
In Astrology, the Moon rules our subconscious and the deeper characteristics of our personality. It also holds our memories. This planet is feminine and is considered the general ruler of women. The Moon rules the 4th sign of the Zodiac, CANCER. I was born with the Moon square Venus…may not be the core reason I don’t like Mondays..but I’m sure it doesn’t help.