YOU SAID:
Don't do today what you can put off until tomorrow.
INTO JAPANESE
明日まで延期できることは今日しないでください。
BACK INTO ENGLISH
Don't do what you can postpone tomorrow today.
INTO JAPANESE
今日明日延期できることをしないでください。
BACK INTO ENGLISH
Don't do what you can postpone tomorrow today.
You've done this before, haven't you.