Batabanda can be compared to the Danish Confirmation.

Samir belongs to the Newar cast.
The Newars are the historic inhabitants of the Kathmandu Valley.

The ritual is called Bratabandha in Nepali and Ketapuja in Newari.
The ritual is performed before the boy becomes a teenager. It is a religious ritual performed by a priest.
The boy is shaved as part of the ritual, stripped almost naked and afterward dressed in a new suit and a white scarf.  Afterwards he is with all the men in the family. Together they eat excellent food.

There is no fixed age for a boy´s ritual
In Newar tradition it is usually performed between the age 5 and 10. In the Nepali tradition it can be done in any time, but usually after turning 15 or just before marriage.
When Samir had had his “Bratabandha”, his sister got married. In that way they could have two parties in one, and in this way save money.
Whereas for girls there are two rituals performed in Newari. One is before 9 years old (in general) and called “ihhi” in Newari and “Bel Bibaha” in the Nepali language. That means marrying with a fruit called “bel” which never dries.

The next ritual for girls is before their menstrual cycle begins. that’s called “Barha” in Newari and “Gufa” in Nepali. It is performed to teach the girl what is going to happen with her body while growing up and menstruating etc.
This ritual is also termed as marriage of a girl with the Sun, which is immortal. Therefore, according to Newari traditions girls/women are never widowed.