Answer

In Jain Dharma, there is no single fixed list of “all dates” in the Gregorian calendar, because most Jain holy days follow the lunar calendar and change every year.

Explanation

Here are the main Jain dates and observances commonly celebrated:

• Paryushan Parva — usually in Shukla/Bhadrapada month, depends on sect
• Samvatsari — the final day of Paryushan for many Śvetāmbara Jains
• Das Lakshan Parva — for Digambara Jains, usually around Bhadrapada / Ashwin
• Mahavir Janma Kalyanak — birth anniversary of Lord Mahavira
• Diwali / Nirvana Day — liberation of Lord Mahavira
• Kartik Purnima — often important for Jain pilgrimages and vows
• Akshaya Tritiya — associated with Lord Rishabhdev’s first parana
• Jnan Panchami — day of worship of knowledge
• Maun Ekadashi — observed as a day of silence and self-restraint
• Nandishwar Ashtahnika — eight-day observance, three times a year in some traditions
• Manglik festivals and vrat days — many local and sect-specific observances

Spiritual Understanding

These dates are not only festival days. In Jain Dharma, they are reminders of:

• Ahimsa
• Self-discipline
• Forgiveness
• Detachment
• Spiritual purification

The exact day may differ between Śvetāmbara and Digambara traditions, and also by region.

Takeaway

If you want, I can give you:

• all major Jain festival dates
• a Jain calendar month-wise list
• Śvetāmbara dates only
• Digambara dates only

If you meant a specific Jain year or a specific festival list, I can format it clearly for you.