Answer

Ganesh Chaturthi 2027 is expected to fall on Saturday, September 4, 2027.

Whether it is on Samvatsari depends on the Jain calendar followed by your sangh, because Samvatsari date can vary slightly by tradition and location.

Explanation

In the Jain tradition, Samvatsari is observed on the final day of Paryushan, especially in the Shwetambar tradition. It usually falls around Bhadarva Sud 4 or Sud 5, depending on calendar calculation and local sangh practice.

Ganesh Chaturthi is also observed on Bhadrapada Shukla Chaturthi, which can sometimes coincide with the Jain Paryushan period or even Samvatsari.

Takeaway

It is possible that Ganesh Chaturthi 2027 may coincide with or fall very close to Samvatsari, but to confirm for your city and Jain sangh, please check the official Jain Panchang followed by your local sangh for 2027.