Lord Shiva or Mahesh is one of the Trimurti (Brahma, Vishnu and Mahesh). Mahesh Jayanti, or Mahesh Navami, is devoted to Lord Shiva. The business community Maheshwaris worships Mahesh and his consort Parvati on the day because it is believed that on the ninth day of Shukla Paksha of Jyestha (May-June) Maheshwari Community was formed. Since then the day is celebrated as Mahesh Navami every year.
Popular legend associated with Mahesh Navami says that once nearly villagers along with Royal men went for hunting in the jungle near Jaipur, Rajasthan. The hunters vent into an ashram and disturbed the serenity and tranquility there. The sages got angry by them and cursed them to become stone.
Then the wives of those unlucky hunters prayed to Lord Shiva for getting rid of the curse. Lord Shiva fall pity on them and agreed to rescue them only if they promise to stop hunting and involve themselves in some other vocation like business. The women agreed the condition and thus all the men were rescued.
The salvaged hunters and their kin left hunting and concentrated on business and they named their community as the Maheshwari community after lord Mahesh to show their love and devotion towards Shiva. In this way Lord Shiva was the saviour of the ancestors of the community.