A short term Monk - Rayong

I really dont know the real name for this process of becoming a monk for a short period of Time. My Thai friend promised me when he was in UK that if he pass exams he will become a monk for a certain period. Fortunately early this year when he became a monk I was in Thailand and I attended the cermony, partcipated everything in his town in Rayong. he was given a shower by everyone, went to the temple in a special procession. plz see pics for details.