Answer

In Jain tradition, it is generally considered better to avoid haircut and shaving on Chaudas, especially if it is Vadh Chaudas and you are observing religious discipline, doing pratikraman, fasting, or preparing for a sacred day.

Explanation

Chaudas is spiritually important in Jain Dharma. Many Jains observe greater restraint on this day through:

• Pratikraman
• Samayik
• Fasting or other tapasya
• Avoiding unnecessary worldly activities
• Practicing more care in ahimsa and self-control

Haircut and shaving are usually treated as worldly or bodily-maintenance activities, so many families and Jain traditions avoid them on such tithi days.

Spiritual Understanding

The main idea is not superstition, but restraint and inner focus. On sacred tithis like Chaudas, one tries to reduce attention toward the body and increase attention toward the soul, repentance, and dharma.

Takeaway

If it is not urgent, avoid haircut and shaving on Vadh Chaudas and do it on another suitable day. If there is a medical, professional, or unavoidable reason, act with awareness and consult your family tradition or Guru Bhagwant if possible.