Obon (お盆?) or just Bon (盆?) is a Japanese Buddhist custom to honor the spirits of one's ancestors. This Buddhist-Confucian custom has evolved into a family reunion holiday during which people return to ancestral family places and visit and clean their ancestors' graves, and when the spirits of ancestors are supposed to revisit the household altars.
From wiki, I don't care about Bon festival. So, I have no holiday during this period. Never at all. The most troublesome issue is how to kill time at office.