Answer

In Jain Dharma:

• Pakhi generally refers to the observance on the 15th tithi, either Purnima or Amavasya.
• Chaudas refers to the 14th tithi.

For October 2026, I would need the specific Jain Panchang for your location/tradition to give the exact dates accurately.

Explanation

Pakhi and Chaudas dates depend on the lunar tithi, and the tithi can vary by:

• Location
• Sunrise timing
• Jain sect/tradition followed
• Local Panchang calculation

So I should not give exact dates without a verified Jain Panchang.

Takeaway

Please check your local Jain Panchang for October 2026, or share the Panchang/location you follow, and I can help you identify the Pakhi and Chaudas dates from it.