Answer

If by Maskhaman you mean Māsakṣamaṇa or Maaskhaman, it is the Jain austerity of consecutive upavāsa for one month. In the sources I checked, it is described as a practice, not as one fixed historical story. Jain tradition more often gives a narrative origin to other fasts, such as Varṣītap, which is modeled on Ṛṣabhanātha’s 13-month fast. ( jainqq.org)

Explanation

Māsakṣamaṇa is one of the severe Jain tapas. It is undertaken with discipline, prayer, and spiritual focus. More generally, Jain fasting is understood as a way to reduce karma and deepen detachment. ( jainqq.org)

Spiritual Understanding

From a Jain point of view, Maskhaman is less about a single legend and more about inner purification. The outer fast supports repentance, humility, self-control, and meditation. ( jainqq.org)

Takeaway

In Jain Dharma, Maskhaman is a month of sacred restraint done to weaken karma and strengthen the soul. ( jainqq.org)