Upanayana Ceremony clothing, Bengal
Sudip Kundu (photographer) wrote:
The word Upa+nayana means taking somebody near (upa) knowledge. In ancient times, after the ceremony was performed, the child was sent to the Guru’s house (Gurukul) for education, where the child remained until completion of education.
Even today, there are many Vedic Gurukulas (traditional Vedic schools) which follow this practice.
(via Instagram: Sudip Kundu (photographer))

Upanayana is one of the traditional saṃskāras (rites of passage) that marked the acceptance of a student by a guru (teacher) and an individual’s entrance to a school in Hinduism.

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