月つき日ひが経たつ

expression, godan verb (-tsu)

time passes; the days and months go by

A set phrase expressing the passage of time, often with a sense of nostalgia or reflection. Used in both spoken and written Japanese.

• 月つき日ひが経たつのは早はやいものだ。

  How quickly the days and months go by.

• あれからずいぶん月つき日ひが経たった。

  A lot of time has passed since then.