Answer

In Jain Dharma, Dashlakshan Parva does not have the same “usual” calendar date every year. So 17th September may be different from usual because Dashlakshan dates change according to the Jain lunar calendar, not the fixed English/Gregorian calendar.

If you are referring to a specific year, please tell me the year, and I can explain more clearly.

Explanation

Dashlakshan Parva is mainly observed in the Digambar Jain tradition and is connected with the ten supreme virtues:

• Uttam Kshama — supreme forgiveness
• Uttam Mardav — supreme humility
• Uttam Arjav — supreme straightforwardness
• Uttam Shauch — supreme purity/contentment
• Uttam Satya — supreme truthfulness
• Uttam Sanyam — supreme self-restraint
• Uttam Tap — supreme austerity
• Uttam Tyag — supreme renunciation
• Uttam Akinchanya — supreme non-possessiveness
• Uttam Brahmacharya — supreme celibacy/chastity

The exact day of Dashlakshan depends on the tithi. Because tithis do not match fixed English dates every year, a date like 17th September can fall on a different Dashlakshan day in different years.

Spiritual Understanding

The important point is not the English date, but the virtue being observed on that tithi. Each day of Dashlakshan is a reminder to purify the soul by reducing anger, ego, deceit, greed, attachment, and carelessness.

Takeaway

Please share the year you mean for 17th September, and I can tell you what is different on that day in Dashlakshan.