Upanayan Sanskar, also known as Janeyu Sanskar, is a Hindu rite of passage that marks a student's initiation into a school and acceptance by a teacher. The ceremony marks a student's acceptance by a teacher, or guru, and their entrance into formal education. It's also a symbol of the student's entry into adolescence. 

The ceremony is considered a spiritual rebirth and the first step towards self-knowledge. It's also an initiation
​During the ceremony, a sacred thread, or Janeu, is tied around the child's body. The thread symbolizes the student's responsibility to live by certain virtues, knowledge, and discipline. into learning the sacred Gayatri mantra.