Customs and traditions differ from one part 
of Nepal to another. A conglomeration lies in capital city Kathmandu 
where cultures are blending to form a national identity. Kathmandu 
Valley has served as the country’s cultural metropolis since the 
unification of Nepal in the 18th Century.A prominent factor 
in a Nepali’s everyday life is religion. Adding color to the lives of 
Nepalis are festivals the year round which they celebrate with much pomp
 and joy. Food plays an important role in the celebration of these 
festivals.
Religion:
Nepal was declared a secular country by the Parliament on May 
18, 2006. Religions practiced in Nepal are: Hinduism, Buddhism, Islam, 
Christianity, Jainism, Sikhism, Bon, ancestor worship and animism. The 
majority of Nepalis are either Hindus or Buddhism. The two have 
co-existed in harmony through centuries.
Buddha is widely worshipped by both Buddhists and Hindus of Nepal. The 
five Dhyani Buddhas; Vairochana, Akshobhaya, Rathasambhava, Amitabha and
 Amoghasiddhi, represent the five basic elements: earth, fire, water, 
air and ether. Buddhist philosophy conceives these deities to be the 
manifestations of Sunya or absolute void. Mahakaala and Bajrayogini are 
Vajrayana Buddhist deities worshipped by Hindus as well.
Hindu Nepalis worship the ancient Vedic gods. Bramha the Creator, Vishnu
 the Preserver and Shiva the Destroyer, are worshipped as the Supreme 
Hindu Trinity. People pray to the Shiva Linga or the phallic symbol of 
Lord Shiva in most Shiva temples. Shakti, the dynamic element in the 
female counterpart of Shiva, is highly revered and feared. Mahadevi, 
Mahakali, Bhagabati, Ishwari are some of the names given. Kumari, the 
Virgin Goddess, also represents Shakti.Other popular deities are Ganesh 
for luck, Saraswati for knowledge, Lakshmi for wealth and Hanuman for 
protection. Krishna, believed to be the human incarnation of Lord Vishnu
 is also worshipped widely. Hindu holy scripts Bhagawat Gita, Ramayan 
and Mahabharat are widely read in Nepal. Vedas, Upanishads and other 
holy scriptures are read by well learned Brahmin Pundits during special 
occasions.
Customs:
The diversity in Nepal in terms of ethnicity again makes room for 
various sets of customs. Most of these customs go back to the Hindu, 
Buddhist or other religious traditions. Among them, the rules of 
marriage are particularly interesting. Traditional marriages call for 
deals arranged by parents after the boy or girl come of age.
Nepalis do not eat beef. There are several reasons for this, one being 
that the Hindus worship cow. Cow is also the national animal of Nepal. 
Another interesting concept among Nepalis is division of pure and 
impure. “Jutho” referring to food or material touched by another’s mouth
 directly or indirectly, is considered impure by Nepalis. Nepalis 
consider cow dung to be pure for cleansing purposes. During menstruation
 women are considered impure and hence, are kept in seclusion until 
their fourth day purification bath.Nepal is a patriarchal society. Men 
usually go out to work while women are homemakers. However, in cities, 
roles can differ. Most Nepalis abide by the caste system in living 
habits and marriage. Rural Nepal is mostly agrarian, while some aspects 
of urban life carry glitz and glamour of the ultra-modern world.
Food:
Nepal does not have a distinct cooking style. However, food 
habits differ depending on the region. Nepali food has been influenced 
by Indian and Tibetan styles of cooking. Authentic Nepali taste is found
 in Newari and Thakai cuisines. Most Nepalis do not use cutlery but eat 
with their right hand.The regular Nepali meal is dal (lentil soup), bhat
 (boiled rice) and tarkari (curried vegetables), often accompanied by 
achar (pickle). Curried meat is very popular, but is saved for special 
occasions, as it is relatively more expensive. Momos (steamed or fried 
dumplings) deserve a mention as one of the most popular snack among 
Nepalis. Rotis (flat bread) and dhedo (boiled flour) also make meals in 
some homes.
Source http://welcomenepal.com/promotional/know-nepal/culture/