Answer

Yes, you can do tapasya in Chaturmas with fewer days, according to your strength and guidance. For example:

• 1-day upvas with parna the next day
• 2-day upvas
• 3-day or 5-day tapasya
• Ekasana or ayambil as a lighter form of discipline

Explanation

In Jain Dharma, tapasya should be done with:

• right intention
• humility
• self-control
• care for health

If you want fewer days, it is better to take a small, steady vow instead of forcing a long tapasya and then struggling. You can decide:

• how many days you will do it
• what type of tapa it will be
• when parna will be done
• whether you want to repeat it weekly or monthly during Chaturmas

Parna should be done in a proper and शांत way, according to your local tradition and under the guidance of your guru, sadhvi, or sangh.

Spiritual Understanding

In Jain Dharma, the main value of tapasya is not only the number of days. The real value is in:

• reducing desires
• increasing आत्मसंयम
• developing faith
• purifying the mind

Even a smaller tapa done with sincerity has great spiritual benefit.

Takeaway

If you want less number of days, choose a tapasya that is doable and stable for you. A small tapa done with devotion is better than a big tapa done with difficulty.