YOU SAID:
I won't be able to make the meeting today or tomorrow night
INTO JAPANESE
今日も明日の夜も会議に出席できない
BACK INTO ENGLISH
I can't attend the meeting today or tomorrow night.
INTO JAPANESE
今日も明日の夜もその会議には出席できません。
BACK INTO ENGLISH
I can't attend the meeting today or tomorrow night.
You've done this before, haven't you.