This is the 575th most frequent Japanese word.
行事
An event or ritual.
Here, '行事' refers to events or functions, typically recurring ones in schools or communities.
日本の学校では多くの行事が行われます。
In Japanese schools, many events take place.
In this context, '行事' is used to denote a specific occasion or corporate gathering.
会社の新年行事に参加しました。
I participated in the company's New Year event.
This sentence uses '行事' to indicate an upcoming planned activity or event.