Today's idiom

save the day/situation

실패,패배,곤경에서 가까스로/극적으로 성공/해결하다, 해내다

You really saved the day.

정말 네 덕분에 살았다!

The team was expected to lose, but Mr.Son made three points and save the day.

save the date

청첩장이나 모임 초대장에 '그날을 비워두세요' 

신품출시 행사 초대장에 '날짜 저장' 

I'll pick up a "save the date" card tomorrow. 내일 청첩장 선택할거야

They sent out a save-the-date 6months before their wedding to ensure all their friends could attend.