On the first day of Chhath Puja, the devotees take a dip, preferably in the holy river Ganges, and carry home the holy water of the river Ganges to prepare the offerings.
The house and surroundings are scrupulously cleaned. The parvaitins allow themselves only one meal on this day.It is also known as " kaddu-bhat" in some region.Generally Parvaitin eat kaddu, channa dal, and arwa chawal (non-boiled rice).
Traditionally the food is cooked on an earthen stove & mango wood is used as fuel. Only, preferably, new bronze or earthen utensils are used to prepare the food. If old utensils are used, non veg should never have been cooked in it. But nowadays steel utensils are also used in preparation of the food.