Rite no. 8 / 16
चूडाकरण
The first tonsure
The first shaving of the head — a simple rite of cleanliness and growth that quietly marks the end of infancy and the child's step into the wider world of childhood.
Usually in the first or third year.
Gṛhya-Sūtras — the tonsure — SBE Vol. 29 (1886); cf. Laws of Manu II.35 (public domain)
The Gṛhya-Sūtras, Part I · trans. Hermann Oldenberg · 1886 · Public Domain