>>280662756
>another couple of months form the entrance exam to April entering UA
It's only one month.
>a two month time skip for summer break after Kamino arc

No there isn't. The kids are out of school for a few days and the dorms take three days to build. That time isn't even skipped because it's when the teachers visit the students. They're probably out of school for around a week at best. Why would you even think this?
>two month time skip after overhaul arc
??????? This is not true and is never stated.

Nearly everything that you're saying is skipped either isn't or is covered in the Light Novels. Did you even read the book/watch the show?