Varuthini Ekadashi
The greatness about Varuthini Ekadashi is narrated by the god Krishna to the King Yudhishthira in the "Bhavishya Purana". The ekadashi will turn a lame person to walk normally, an unfortunate woman into a lucky one, animal would be released from its cycle of birth and death. King Mandata was enlightened. The Ikshvaku king Dhundhumara was freed was from a curse by the god Shiva. All human beings are assured of prosperity in this life and the next. In the order of donations made on this day, the order of superior benefits are derived in the ascending order of benefits given namely, a horse, an elephant, land, sesame seeds, food grains, gold and cows and finally the highest benefit would be achieved by sharing one's knowledge with others. All such charitable actions would please one's ancestors, the gods and all living entities. Like all ekadashis, the god Vishnu is to be worshipped, however on Varuthini Ekadashi particularly his fifth avatar Vamana. On Varuthini Ekadashi, certain rules are prescribed to be followed strictly. One should keep an all-night vigil, praying to God, singing devotional songs and hymns in the company of family members. One should not indulge in gambling, sports, sleep, anger, robbery, lying, being narrow minded, brushing one's teeth, exercise, shaving one's head, face or body, smearing oil on one's body and saying something bad about others. One should abstain from violence and any sexual activity. One should observe a fast ("upavasa") and have only one meal. One should not eat meat, black gram, red lentil, chickpea, honey, betel nut, paan (betel nut leaves) and spinach. Eating in Bell metal utensils and eating in someone else's house is prohibited. The "Havishyanna" food (boiled food without spices, salt and oil) offered to the yajna (fire sacrifice) on the previous day (10th lunar day - "Dashami") should be consumed by the people observing this fast. Like the name of this holy day - "Varuthini" ("armoured/protected") suggests, the devotee following this day's "vrata" (vow) is said to be protected from all harm and evil and gain good fortune. Following all these rules on Varuthini Ekadashi is believed to usher prosperity, name and fame to the individual in the society.
In scripture
By both schemes, Varuthini Ekadashi falls on the same day in April or May.