In Jainism, the days of the week themselves (like Monday, Tuesday, etc.) are not specifically assigned to any particular Tirthankara. Jain tradition does not associate the days of the week with the Tirthankaras in the same way some other Indian religions might link days to deities or planets.

However, devotees may choose to perform special worship or rituals for any Tirthankara on any day, but there is no scriptural basis for assigning specific Tirthankaras to specific days of the week in Jain doctrine. Instead, certain days are significant for particular Tirthankaras due to their life events (such as birth, enlightenment, or moksha), and those days are celebrated as festivals or special observances, like Mahavir Jayanti for Lord Mahavira.

If you are seeking information about the special days or festivals related to specific Tirthankaras, please specify, and I can provide those details.