Solah Somvar Vrat is a fasting ritual that involves observing a fast and performing puja to Lord Shiva for 16 Mondays. The 17th Monday is known as Udyapan and is performed for the successful completion of the Sankalp.

There are different ways to observe the Monday fast, but on the day of Somvar Udyapan, the devotee should take a bath and wear clean clothes. They should observe a fast that involves eating only once. On the seventeenth Monday, the prasad should be prepared with flour mixed with ghee and jaggery and distributed among the devotees, members of the family, and others.

Here are some general guidelines for observing the Monday fast:

• Observe the fast on Mondays of Magha month, Phalgun month, and Savan month.
• The number of fasts depends on the devotee, but the importance and impact of every fast are different.
• Certain rules should be followed while observing Solah Somvar Vrat. This fast is mainly observed to get a good and specific life partner. Those who are facing problems in marital life should observe this fast to get rid of all marital problems and lead a happy married life.
• Precautions should be taken while observing the Monday fast.
• The fast can be started at any time and can be observed any number of times.

On the 17th Monday of Solah Somvar Vrat, special pujas dedicated to Lord Shiva are held.