Answer

Ganesh Chaturthi and Samvatsari are not always on the same day because they belong to different religious traditions and are observed according to different lunar dates and purposes.

• Ganesh Chaturthi is a Hindu festival observed on Bhadrapada Shukla Chaturthi, the 4th day of the bright half of the month.
• Samvatsari is a Jain festival observed at the end of Paryushan, especially by the Śvetāmbara Jain tradition.

Explanation

In the Indian lunar calendar, festivals are based on tithi, not fixed English calendar dates.

Ganesh Chaturthi falls on the 4th tithi of Shukla Paksha in Bhadrapada.

Samvatsari is connected with the completion of Paryushan Parva. In the Śvetāmbara tradition, Paryushan is usually observed for 8 days, and Samvatsari is the final and most important day of forgiveness, repentance, and spiritual reflection.

Because these observances are calculated differently, they may sometimes fall close together, but they are not required to fall on the same day.

Spiritual Understanding

In Jain Dharma, Samvatsari is not a celebration in the worldly sense. It is a sacred day of:

• Pratikraman — repentance and self-reflection
• Kshamapana — asking forgiveness
• Micchāmi Dukkaḍaṃ — seeking forgiveness for harm caused knowingly or unknowingly
• Inner purification — reducing anger, ego, deceit, and greed

Ganesh Chaturthi, on the other hand, is centered on devotion to Lord Ganesha in the Hindu tradition.

Takeaway

They are not on the same day because Ganesh Chaturthi follows Bhadrapada Shukla Chaturthi, while Samvatsari follows the Jain Paryushan calendar. Their dates may be near each other, but their religious meaning and calendar basis are different.