Sometimes, the Kinen-sai festival (the Shinto service to pray for a good crop) in February is called spring festival, and the Niiname-sai festival (ceremonial offering by the Emperor of newly-harvested rice to the deities) in November is called autumn festival.
2月の祈年祭を春祭、11月の新嘗祭を秋祭とする場合もある。