For Nepali, Kartika month holds immense importance as it is the only month which is dedicated to the worship of both Lord Shiva and Lord Vishnu.

One may observe the following foremost activities throughout the entire month of Kartik:
Japa – chanting the holy names of the Lord.
Worship the Lord by offering ghee lamps (diyas), flowers, incense, food, etc.
Practice brahmacharya – celibacy.
Worship of Tulasi Devi.
Perform austerities.
Give charity. Go here to help in cow protection in Nepal- https://iskconnepal.org/iskcon-tilottama-cow-protection/