Δεν μου αρέσει Δευτέρα
You should use the definite article in this: Δε μου αρέσει η Δευτέρα (I also dropped the ν in δεν because the next word starts with μ and it flows better, but even with ν it's not unheard of).
it's funny how sad is the voice saying "monday" compared to the other days
Day two