This day is one of the most traditional Japanese National Holidays. It is the celebration of seasonal change typical of an agricultural society: this is the day when the day-time and the night-time are equal length. The actual date of the Vernal Equinox day may change from year to year due to leap year but usually it is during 20,21 March.

Many Japanese visit their family tombs on this day in the middle of the week to pay their respects to their ancestors. People weed their family tombs, and leave flowers, incense and ohagi (sweet rice balls covered with red bean paste).