Cho Khor Duchen

Today is one of the four major Buddhist festivals in the Tibetan tradition: ཆོས་འཁོར་དུས་ཆེན་ or Chökhor Düchen, the Festival of Turning the Wheel of the Dharma. It commemorates Buddha teaching for the first time after his enlightenment. As the traditional narrative goes, after his enlightenment, Buddha remained in silence as he felt his insight was too profound to explain. According to the narrative, Indra and Brahma petitioned and encouraged him. And so at Sarnath he taught the "first wheel turning", the four noble truths. There is a lot that could be said about that. The story is less important. It's the genesis of the Buddhist spiritual project.