Hinduism is the largest religion in Nepal. In 2006, the country declared itself a secular country through democracy, after the abolition of its monarchy. According to the 2021 census, the Hindu population in Nepal is estimated to be around 23,677,744 which accounts for at least 81.19% of the country's population, the highest percentage of Hindus of any country in the world. Vikram Samvat, one of the two official calendars used in Nepal, is a solar calendar essentially the same to that widespread in North India as a religious calendar, and is based on Solar unit of time.
Among the ethnic groups are the Bahun, Thakuri, Tharu, Chhetri, Magars, Hill Dalits, Madheshi, Newari people. Meanwhile, among the major ethnic groups Sherpa, Rai, Limbu, Gurung and Tamang have lowest percentage of followers of Hinduism within the group.