How are people still commenting on this post? Haha. Rong Zhang, to answer your question, it's best to give any other answer. So even if you didn't do much during the weekend, you can say "I stayed home and relaxed" or "I caught up on sleep". Saying "I did nothing" is considered boring.

Ryan, so when American friend asked me what I did on the weekend, I should say something, whatever I did. That will be more reasonable and proper, right? We say 入乡随俗 Do in Rome as Rome does.

You're right, but it was meant to be funny :)