Mahashivratri Puja commences in the evening and goes on till the following day; it is a 4 Prahar puja. Devotees sing, dance, conduct Puja, and stay awake all night on this festival, and it is celebrated with great joy and fervor. https://www.thewyco.com/general/shiv-abhishek-samagri-and-articles-used-on-mahashivratri-23-03-2021