Chhath is considered to be an ancient Hindu festival.On Chhath Puja various rituals are performed for Thanksgiving Sun God for sustaining life on earth and granting Health, Prosperity & Abundance.
The word "Chhath" symbolizes the number 6 in Hindi language and the festival begins on the sixth day of the Hindu lunar month of Kartik.The festival continues for four days during which people, especially women, follow diligent rituals including fasting for 36 hours.
Chhat Puja is the only Vedic Festival of India: Chhath Puja is considered to be one of the most ancient festivals of India surviving on earth.This puja first finds mention in the Rig Veda which contains hymns worshiping the Sun God and describes similar rituals.
The rituals performed during Chhath have scientific reasons: Rituals in Chhath Puja increases absorption and conduction of solar-bio-electricity in a human body. The processes and the rituals of the Chhath puja aim at preparing the body and the mind of the devotee for the process of cosmic solar energy infusion.
Four days rituals are designed in such a way that it benefits the health of the devotee: During the Puja, standing in the river Ganges allows the absorption of energy from the sun which moves along the spine and cleanses the body. This helps in better functioning of the body and calms down the mental state of the devotee. It reduces anger and negativity from the life of the devotee.
Worshipping Sun God on Chhath is prevalent in the ancient Egyptian and Babylonian civilizations of the world: Chhath puja has its international significance as it also celebrated in other countries like Mauritius, Fiji, Trinidad and Tobago etc. as a part of their own traditions & customs.
Chhath Puja hails back to the time of the Mahabharata: Draupati is also considered to be the devotee of Sun God apart from Karna. Due to her devotion toward Surya, she was gifted with the unique power to cure even the deadliest diseases. Through this power gifted by her, Pandavas survived and won the Kurukshetra Battle over Kauravas and regained their kingdom back.