adverb
within the year; before the year is out
Used to indicate that something will happen or be completed by the end of the current calendar year. Often used with verbs like 終わる, 完成する, 提出する.
このプロジェクトは年内に終わらせます。
I will finish this project within the year.
年内に一度お会いしたいです。
I'd like to meet you once before the year is out.