This is the 1893rd most frequent Korean word.
그해
"That year."
Here, '그해' translates to 'that year', referring to a specific year in the past context where the summer mentioned occurred.
그해 여름은 정말 더웠습니다.
That summer was really hot.
In this sentence, '그해의' functions as a possessive, indicating 'of that year', relating to the memories.
나는 그해의 추억을 잊을 수 없습니다.
I cannot forget the memories of that year.
The usage '그해에는' emphasizes the timeframe 'in that year', highlighting the events mentioned that occurred within that period.