Equinox Ceremony (Higan-e) March and September
In Japanese, there is a proverb that says “Hot and cold weather last until the equinox”. This week-long ceremony takes place on the spring and fall equinoxes, the middle of an important week when the weather is usually very good.
Higan is the teaching that leads people from the world of delusion to the world of awakening. There are six components of this teaching: giving, precepts, perseverance, diligence, zazen, and wisdom. It is taught that if we carry out these practices we will be blessed with happiness and good fortune.
On the day before Higan, it is the custom in a Japanese home to clean the Buddha altar, to straighten up the various Buddha implements, and to change the flowers on the altar. It is also customary to make offerings of rice dumplings on the first day of the week. On the equinox (the middle day of this week) rice cakes covered with bean jam called ohagi or botamochi are offered. And once again on the final day of the week, dumplings made from rice flour are offered. During this time, offerings of food, special sweets, and fruit are also made.
http://global.sotozen-net.or.jp/eng/event/autumn/hig_ryou_daru.html