Holidays are for sleeping

Every time the weekend comes, I feel so exhausted. No matter how much I sleep, I still wake up at my usual biological clock time the next day. After breakfast, I always feel like going back to sleep. If I wake up around noon, I'll eat lunch, otherwise, I'll sleep until it's time for dinner. Then I'll shower, do laundry, tidy up a bit, and go back to sleep. Things I originally planned to finish sometimes just get postponed like this, even though they might only take an hour or two.