I wonder if I have "Gogatsu-byo".

  I am tired out and very sleepy now, because there are a lot of things to do recently. In addition, I am studying harder than when I was preparing for the entrance examination. Is this "Gogatsu-byo"?
 
  "Gogatsu-byo" is one of mental illnesses."Gogatsu" means "May" in English, and "byo" means "illness". Some people feel sleepy or tired or spiritless if they have "Gogatsu-byo", and those who cannot adapt themselves to their surroundings well are liable to get "Gogatsu-byo". In Japan, a new life, or to enter a university for example, begins in April, and people are tired from getting used to new lives in May, especially after Golden Week(Japanese consecutive holidays), so I think "Gogatsu-byo" is peculiar to Japan. However, there may be another illness like it in other countries. For instance, "October-illness" may exist in the U.S.

If you think you have "Gogatsu-byo" now, I recommend you taking a rest, exercising, and sleeping well during Golden Week or a holiday. I think it is the best way to cure the illness, so I would like to do so, and I would like to study harder after Golden Week.