 In 1684, however, the calendar was altered so that the new moon fell on the first day of each month, moving the full moon two weeks later, to the 15th day of the month.While some people in Edo (present-day Tokyo) shifted their Tsukimi activities to the 15th day of the month, others continued to observe the festival on the 13th day.Furthermore, there were various regional observances in some parts of Japan on the 17th day of the month, as well as Buddhist observances on the 23rd or the 26th day, all of which were used as pretexts for often late-night parties during the autumn throughout the Edo period.