Karwa Chauth 2011 as per Hindu calendar - India Standard Time. Karva Chauth 2011 date is October 15. Karwa Chauth is an annual fasting undertaken by women in North India on the fourth day of Kartik Month, as per North Indian Hindu lunar calendar. Also known as Kadva Choth, it is observed by married women for a happy and prosperous married life and for the well being of the husband and is one of the most popular fast and rituals in North India. Unmarried women usually do not perform this fast.