1993
Friday, 23 July 1993
In 1993 the tithi runs from 5:40 am on 23 Jul to 2:50 am on 24 Jul, and it never reaches sunrise (the usual rule, called udaya tithi), so the day on which it begins is taken: Friday, 23 July 1993.
1994
Thursday, 11 August 1994
In 1994 the tithi runs from 7:05 am on 11 Aug to 4:53 am on 12 Aug, and it never reaches sunrise (the usual rule, called udaya tithi), so the day on which it begins is taken: Thursday, 11 August 1994.
How the date is fixed
Nag Panchami falls on the fifth day of the bright half of the lunar month Shravana (Shukla Panchami). The date is the day on which that tithi is running at sunrise (the usual rule, called udaya tithi).
About
Nag Panchami falls on the fifth tithi of the bright half of Shravana, in July or August, at the height of the monsoon when snakes leave flooded burrows. The tithi at sunrise is taken; if Panchami spans two sunrises the first day is used. The Nagas are the deities of Panchami tithi in the panchang, and the Mahabharata's story of Janamejaya's serpent sacrifice is read on this day. Some regions, including parts of Gujarat and Maharashtra, keep a second Nag Panchami in the dark half.
How it is observed
Images of serpents are drawn or placed at the door and offered milk and flowers; digging the earth is avoided for the day.