Spring festivals are called "haru-matsuri" and often incorporate prayers for a good harvest. They sometimes involve "ta-asobi" ceremonies, in which rice is ritually planted. Summer festivals are termed "natsu-matsuri" and are usually focused on protecting the crops against pests and other threats. Autumn festivals are known as "aki-matsuri" and primarily focus on thanking the kami for the rice or other harvest. The "Niiname-sai", or festival of new rice, is held across many Shinto shrines on 23 November. The Emperor also conducts a ceremony to mark this festival, at which he presents the first fruits of the harvest to the kami at midnight. Winter festivals, called "fuyu no matsuri" often feature on welcoming in the spring, expelling evil, and calling in good influences for the future. There is little difference between winter festivals and specific new year festivals.