Ekadashi

[1] Ekadashi is popularly observed within Vaishnavism one of the major paths within Sanatan Dharma.

[2][3] In Hinduism, the primary purpose of fasting on Ekadashi is to gain control over the mind and bodily senses, and channel it towards spiritual progression.

Devotee can chose the fasting approach that aligns with his/her health, lifestyle, and spiritual goals.

The eleventh tithi corresponds to a precise angle and phase of the waxing and waning moon.

[11] Bhagavata Purana (skandha IX, adhyaay 4) notes the observation of Ekadashi by Ambarisha, a devotee of Vishnu.

Vishnu awoke from his sleep, and blessed the woman by naming her "Ekadashi", and stated that if anyone were to fast on this day, they would attain moksha (liberation from the cycle of birth and death).