The English rendering of "Das Lakshan" is typically "Ten Virtues" (also heard as "Ten Qualities" or "Ten Lakshanas"). In Jain practice, these are the ten supreme virtues to contemplate and cultivate.

Notes for clarity:

• Das Lakshan Parva is a Digambara Jain festival of ten days, each day focusing on one of the ten virtues.
• In Shwetambar tradition, the related period is Paryushan, usually observed for eight days, with a similar emphasis on noble virtues but not always labeled as Das Lakshan Parva.

You can read more here and details about the ten virtues here .