history: When my brother graduated high school, I was very proud of him, it was a big accomplishment My brother graduated high school_comma_ I was very proud of him! I know that feel_comma_ my brother graduated a year ago_comma_ it's a really big milestone.
current: It is, somewhat common, but still, I am proud of him all the same!
next: Yes I agree, it really signifies the start of their next chapter in life.