Hanuman Janmotsav (or Jayanti) commemorates the birth of Lord Hanuman, the Vanara god and devoted servant of Lord Rama, widely celebrated on Chaitra Purnima (full moon). It honors his strength, wisdom, and devotion, 11th Rudra avatar of Shiva, born to Anjana and Kesari. Devotees offer prayers, recite Hanuman Chalisa, and fast to seek protection and strength