Hanuman Jayanti (Sanskrit: हनुमज्जयंती, romanized: Hanumajjayantī) is a Hindu festival celebrating the birth of the Hindu deity, and one of the protagonists of the Ramayana, Hanuman. The celebration of Hanuman Jayanti varies by time and tradition in each state of India. In most northern states of India, the festival is observed on the full-moon day of the Hindu month of Chaitra (Chaitra Purnima). In Karnataka, Hanuman Jayanti is observed on Shukla Paksha Trayodashi, during the Margashirsha month or in Vaishakha, while in a few states like Kerala and Tamil Nadu, it is celebrated during the month of Dhanu (called Margali in Tamil). Hanuman Jayanti is observed on Pana Sankranti in the eastern state of Odisha, which coincides with the Odia New Year.

Hanuman is regarded to be an ardent devotee of Rama, an avatar of Vishnu, widely known for his unflinching devotion. He is revered as a symbol of strength.

Hanuman is a vanara, born to Kesari and Anjana. Hanuman is also known as the celestial son of Vayu, the wind-god. His mother, Anjana, was an apsara who was born on earth due to a curse. She was redeemed from this curse upon giving birth to a son. The Valmiki Ramayana states that his father, Kesari, was the son of Brihaspati, the king of a region named Sumeru, located near the kingdom of Kishkindha near Hampi in present-day Vijayanagara district of Karnataka. Anjana is said to have performed intense prayers lasting twelve years to Shiva to bear a child. Pleased with their devotion, Shiva granted them the son they sought.

Eknath’s Bhavartha Ramayana states that when Anjana was worshiping Rudra, King Dasharatha of Ayodhya was also performing the ritual of Putrakameshti under the guidance of Sage R̥śyaśr̥ṅga in order to have children. As a result, he received some payasam (Indian pudding) to be shared by his three wives, leading to the births of Rama, Lakshmana, Bharata, and Shatrughna. By divine ordinance, a kite (bird) snatched a fragment of that pudding and dropped it while flying over the forest where Anjana was engaged in worship. Vayu, delivered the falling pudding to the outstretched hands of Anjana, who consumed it. Hanuman was born to her as a result.