The dates of these festivals are confused nowadays; some on the Gregorian calendar, others on " Tsuki-okure ". The name of the new era was announced by the Japanese government on 1 April , a month prior to Naruhito 's succession to the throne. Symbolizes the day Buddha died. Many places the religious services are held on July Shanichi dates can vary by as much as 5 days. Although this is just de facto and customary, it is broadly used when setting the dates of many folklore events and religious festivals. Some, such as Yayoi and Satsuki , do double duty as given names for women. But in , as part of Japan's Meiji period modernization, a calendar based on the solar Gregorian calendar was introduced.