Here is a simple, traditional view on the importance of tithis (lunar days) in Jain Dharma:

• What is a tithi: A tithi is a specific day in the lunar fortnight, counted from new moon (amavasya) to full moon (purnima) and back. Each tithi has a particular spiritual significance in the Jain calendar.

• Role in rituals and vows: Many Jain rites, fasts (upvas), and pujas are aligned with specific tithis. Observances often depend on whether the tithi falls in the bright half (shukla paksha) or the dark half (krishna paksha) of the month. Fasting, meditation, and devotional practice are commonly intensified on certain tithis as a means to purify the mind and accumulate spiritual merit.

• Auspicious and inauspicious days: Some tithis are considered more auspicious for certain acts (e.g., starting a vrata, performing a pilgrimage, making offerings) while others may be avoided for major events. The exact understanding of which tithis are especially favorable can differ between Digambar and Shwetambar traditions.

• Link to spiritual rhythm: Tithis provide a rhythm to spiritual practice, helping practitioners to structure discipline—regular reflection, self-control, and detachment—over the cycle of the lunar month. This periodicity supports steady progress on the path (marga) toward liberation (moksha).

• Sect differences to note:

- Digambar tradition: Tithi-based observances and the emphasis on certain days may be framed by specific fasts and practices described in their canonical and chant-based traditions. - Shwetambar tradition: While they too observe tithi-linked practices, the calendar, celebrated fasts, and festival timings (such as Paryushan) reflect their own calendar calculations and liturgical patterns. In both cases, the core aim remains the cultivation of right conduct (samyak), restrained speech, mindful living, and spiritual purification, with the practical observances shaped by each sect’s textual and customary interpretations.

• Practical takeaway for a practitioner:

- Check the local temple or community calendar to know which tithis carry particular practices in your tradition. - Use tithi days as anchors for more intense practice—fasting, meditation, study of Jain scriptures, and charitable acts—while maintaining the overarching goal of self-discipline and detachment. - Remember that individual guidance from a learned guru or elder in your tradition is best for understanding which tithis to observe, and how to integrate them with your daily life.

If you’d like, I can explain how specific tithis are observed in either the Digambar or Shwetambar tradition in more detail, or help you map a simple month-long practice around the tithis you follow.