Acharya Shri Ajeet Surishwar Ji Maharaj is a respected Jain saint and scholar. The phrase "Shankeshwar Dada Mara Sakshat Bhagwan" refers to the veneration of Shankeshwar Parshwanath, a highly revered Tirthankara in Jainism, especially among the Svetambara sect.

However, there is no widely documented or historically established date for when Ajeet Surishwar Ji Maharaj specifically wrote or composed a work titled "Shankeshwar Dada Mara Sakshat Bhagwan." Many Jain hymns (stavan), prayers, and literary works praising Shankeshwar Parshwanath have been composed over centuries by various Jain monks and lay devotees, but a precise date or detailed reference regarding this specific composition by Ajeet Surishwar Ji Maharaj is not available in standard Jain literature.

If you are referring to a particular stavan or literary piece, more specific information might be available from local Jain sanghs, temples, or organizations associated with Ajeet Surishwar Ji Maharaj. Generally, such compositions are meant for devotional purposes and are recited by devotees to seek blessings and express reverence toward Shankeshwar Parshwanath.

If you have a particular text or hymn in mind and can provide more details, I can try to guide you further based on Jain traditions and practices.