December 23rd became a national holiday in 1989 when the current emperor, Heisei Emperor Akihito, ascended the throne. This holiday celebrates the birth of the emperor, a symbol of Japan. On this day, a series of events are held at the Imperial Palace to celebrate. Although the public is not allowed to enter the residence of the Emperor, booths with message books are set up for those who want to send greetings and well-wishes to the Emperor. It is customary for the Imperial family to come out onto a balcony of the palace to greet the well-wishers who have gathered. The cheering crowd responds by waving small rising-sun flags.