Jains celebrate Dashlakshan (Das Lakshan Parva) to purify the soul by focusing on ten supreme virtues taught in the scriptures. By reflecting on these qualities, doing pratikraman (repentance), swadhyaya (study), fasting, and charity, one reduces karmic bondage and strengthens right faith, right knowledge, and right conduct.

The ten virtues (Dash Lakshan) are:

• Uttam Kshamā: supreme forgiveness
• Uttam Mārdava: humility
• Uttam Ārjava: straightforwardness
• Uttam Shauch: purity of mind and contentment
• Uttam Satya: truthfulness
• Uttam Saṁyam: self-restraint of senses and mind
• Uttam Tap: austerity for inner cleansing
• Uttam Tyāg: renunciation and non-possessiveness
• Uttam Akinchan: desirelessness, non-attachment
• Uttam Brahmacharya: chastity and control over passions

Key points:

• It is mainly observed by the Digambar tradition for ten days right after Paryushan, each day dedicated to one virtue, and it culminates in universal forgiveness (Kshamāvaṇī/Madhuparka of forgiveness).
• Śvetāmbar Jains primarily observe Paryushan (eight days) and Samvatsari (forgiveness day). The spiritual goal is the same: self-purification and progress on the path to liberation.

In short, Jains celebrate Dashlakshan to internalize these ten dharmas, lessen anger, pride, deceit, and greed, and move closer to moksha through disciplined practice.