Answer

In Jain Dharma, the most commonly important tithis are:

• Ashtami — 8th lunar day
• Chaudas / Chaturdashi — 14th lunar day
• Purnima — Full moon day
• Amavasya — New moon day

Explanation

These tithis are often considered spiritually significant for:

• Vrata and upvas
• Pratikraman
• Samayik
• Puja, swadhyaya, and tapasya
• Special Jain observances and festivals

Some Jain traditions also give importance to other tithis depending on the occasion, such as Panchami, Dashami, or Trayodashi.

Spiritual Understanding

In Jain Dharma, the value of a tithi is not only in the date itself, but in how we use it for:

• self-discipline
• purification of the soul
• reduction of karma
• devotion and inner reflection

So, every tithi can become sacred if it is spent with awareness, restraint, and spiritual practice.

Takeaway

If you want the main important Jain tithis, remember:

Ashtami, Chaudas, Purnima, and Amavasya.

If you want, I can also give you a Jain monthly tithi guide with the importance of each day.