In Hindu tradition, the timing for Mundan, or the first haircut ceremony for a baby boy, is typically considered auspicious during odd-numbered years such as the first, third, fifth, etc. This ritual is believed to purify the child and promote healthy hair growth, aligning with cultural and astrological beliefs. Families often consult with priests or astrologers to select the most favorable date based on the child's horoscope and planetary positions. The exact age and timing can vary based on regional customs and family preferences, ensuring the ceremony is conducted at a spiritually favorable time for the baby boy's well-being and future prosperity.