Daslakhan Parv (Daśa-lakṣaṇa-parvan) is a key Digambar Jain festival focused on the ten virtues, and it is considered the Digambar counterpart of Paryuṣaṇ observed by Śvetāmbara Jains.

What it is

• A ten-day spiritual observance that centers on contemplating and practising ten cardinal virtues (lakṣaṇas).
• Begins the day after the end of Paryuṣaṇ in the Digambar calendar and ends around the time of the annual Diwālī festival.
• The climax includes Kṣamāpanā (forgiveness) and the annual confession ceremonies, inviting all participants to seek forgiveness from others for past misdeeds.

The ten virtues (the core of the parva) 1) Uttam Kṣamā – supreme forgiveness 2) Uttam Mardavā – supreme gentleness/humility 3) Uttam Arjava – supreme straightforwardness/honesty 4) Uttam Śaucā – supreme purity 5) Uttam Satya – supreme truthfulness 6) Uttam Saṃyama – supreme self-restraint 7) Uttam Tapa – supreme austerity/penance 8) Uttam Tyāga – supreme renunciation 9) Uttam Akinchanya – supreme non-possessiveness 10) Uttam Brahmacarya – supreme celibacy

Key practices during the period

• Daily reflection and vows aligned with one virtue each day.
• temple discourses, prayer, scriptural study, and communal or personal acts of purification.
• The festival culminates in forgiveness rituals, where people ask for forgiveness using the traditional practice of Micchāmi Dukkaḍaṃ and perform public pratikramaṇa (confession).

Important context

• Daslakhan Parv is especially significant for Digambar Jains as a dedicated period of self-purification, moral realignment, and communal harmony.
• Śvetāmbara Jains observe a closely related period called Paryuṣaṇ, but the two traditions name and time their observances somewhat differently. In essence, both aim at atmashuddhi (purification of the soul) through forgiveness, study, fasting, and virtuous living.

You can read more here

Note: If you would like a concise, tradition-by-tradition comparison (Digambar vs Śvetāmbara) or a schedule of typical daily readings and vows for the ten days, I can summarize that as well.