"Kinda days" usually refers to days that are somewhat or slightly like a particular quality or feeling. It implies that the days have elements or aspects of that quality, but not fully or completely. Full definition
Any of these pairs would dress up a white and tee and jeans kinda day. (stylewaltz.com)
Often, when we eat out or when it's very hot and humid... You know, kinda days when it does not feel great to eat heavy food.... (chefdehome.com)
I go back and forth between sweet and savory breakfasts, but this one fits the bill perfectly for a savory breakfast kinda day. (neilshealthymeals.com)