Jaintraditionally there is no fixed number of years like BCE given for Mallinath’s birth. In Jain cosmology, Mallinath is the 19th Tirthankar of the present avasarpiṇī (time cycle) and is said to have been born in Mithilā, with the two major traditions differing on gender (Shvetambaras call Mallinath a female Mallī Devi, Digambaras say he was male). The texts describe enormous ages and cycles rather than a specific year count. If you want the simple story and the sectarian notes, you can read a concise, tradition-faithful write-up here .