Brihaspati Vrat Udyapan Puja is a Hindu ritual performed at the end of the Brihaspati Vrat, which is a fast observed on Thursdays to seek blessings from Lord Brihaspati, the planet Jupiter. The Udyapan Puja is performed to conclude the Vrat and mark the successful completion of the fast.

The Udyapan Puja typically involves the worship of Lord Brihaspati and the offering of prayers, flowers, and other offerings. The devotee who has observed the fast is required to offer food and gifts to Brahmins and seek their blessings.

The Udyapan Puja is believed to be a way of expressing gratitude to Lord Brihaspati for his blessings and seeking his continued guidance and protection. The fast is believed to bring good fortune and prosperity to the devotee and is observed for a period of three, five, seven, or nine Thursdays.

The Brihaspati Vrat Udyapan Puja is a significant ritual in Hinduism, and it is widely practiced by devotees who seek the blessings of Lord Brihaspati. The Puja is believed to bring success, happiness, and prosperity to the devotee and is a powerful way to connect with the divine energy of Lord Brihaspati.