Answer

In Jain Dharma, the best time to fast is when it can be done with right intention, peace of mind, and proper self-control.

Commonly observed auspicious times for fasting include:

• Paryushan / Das Lakshan Parva
• Ayambil Oli
• Chaturmas
• Samvatsari
• Punam, Chaudas, Atham, or other tithi-based days
• Birth and Kalyanak days of Tirthankars

Explanation

Fasting in Jainism is not only about avoiding food. Its true purpose is to reduce attachment, control desires, practice discipline, and focus more on the soul.

A fast is spiritually meaningful when it is done with:

• Forgiveness
• Calmness
• Less anger, ego, deceit, and greed
• Prayer, samayik, pratikraman, svadhyay, and meditation
• Compassion toward all living beings

Spiritual Understanding

The best fast is not the one done only on an auspicious day, but the one done with bhav shuddhi — purity of inner feelings.

If the body is unwell, one should not force tapasya out of ego or comparison. Jain Dharma values both discipline and awareness.

Takeaway

The best time to fast is an auspicious Jain day, especially during Paryushan, Ayambil Oli, Chaturmas, or holy tithis — but the best attitude is even more important: fast with humility, self-control, and devotion.