During the hottest season (northern hemisphere), if one can perform
upavasa without water one is performing a great feat. One may take only
charanamrita and achman water. Bhima requested one vrata day by which he
could obtain the fruits of all the other days of vrata that he was incapable
of observing.
Vyasadeva advised him to follow this difficult vrata.
One should worship the Lord in the evening by bathing him in milk. On the
dvadasi one should give full pots of wa