In Jainism, there are 24 Tirthankaras (spiritual teachers). The exact day of the week (like Sunday, Monday, etc.) on which each Tirthankara was born is not universally documented in the Jain scriptures. Most Jain texts focus on the month, tithi (lunar day), and place of birth rather than the day of the week according to the Gregorian calendar.

However, for Lord Mahavira (the 24th Tirthankara), it is traditionally believed—especially among some Svetambara sect traditions—that he was born on the 13th day of the bright half of the Chaitra month (Chaitra Shukla Trayodashi). Some Jain calendars may mention that this day coincided with a Sunday, but this is not a universally recognized or scripturally emphasized detail.

For the other Tirthankaras, Jain Agamas and traditional texts like the "Kalpa Sūtra" provide information about:

• Their names
• Places of birth (janma kalyanak)
• Names of parents
• Symbols (lanchhan)
• The month and lunar day (tithi) of birth

But specific information about the day of the week (like Sunday, Monday, etc.) for the birth of each Tirthankara is generally not given in Jain scriptures.

If you are interested in the tithi, month, or other birth details of the Tirthankaras, I can provide that information. Let me know if you would like those details!