When Alice entered the Forest of Forgetfulness, she often forgot what day of the week it was. She encountered a Lion and a Unicorn, two strange creatures. The Lion lies on Mondays, Tuesdays and Wednesdays and tells the truth on the other days of the week. The Unicorn, on the other hand, lies on Thursdays, Fridays, and Saturdays, but tells the truth on the other days of the week.
One day Alice met the Lon and the Unicorn resting under a tree. They made the following statements.
Lion: Yesterday was one of my lying days.
Unicorn: Yesterday was one of my lying days, too.
From these two statements, Alice was able to deduce the day of the week. What day was it? Provide evidence and a complete sentence to support your conclusion.