How interesting! This time around, Mark’s story got just one week, while Cherry had two weeks before. Now, we’re back to the never-ending saga of Cherry and the Sunny Soleil Society. It’s interesting how Caroline’s face has changed from what originally looked like a stereotypic young Southern Belle to that of a middle-aged crone.
Since Rivera brought it up in panel 4, there is talk on CK that Cherry’s statement might be a reference to the song “I don’t like Mondays”, which was inspired by Brenda Spencer, the teenager who shot up a school in 1979, killing at least two people. This really doesn’t make much sense. A better suggestion is from commenter djed, who points out the orange tabby cat in panel 4, and notes that comic cat Garfield is well-known for his dislike of Mondays. So, this certainly works as a comic strip “in joke” and fits into Rivera’s occasional employment of the gag-a-day strip format.