年としをまたぐ

expression, godan verb (-gu)

span across years; extend into the next year

Used for events, projects, or periods that continue from one calendar year into the next. Often appears in business or scheduling contexts.

• このプロジェクトは年としをまたぐ予よ定ていです。

  This project is scheduled to extend into the next year.

• 年としをまたぐ旅りょ行こうの計けい画かくを立たてている。

  I'm planning a trip that spans two calendar years.