In Jainism, the closest spiritual equivalents to Navratri are:

• Paryushan Parva (Shvetambar traditions)

- A two-week to ten-day period of fasting, self-discipline, reading scriptures, reflection, and asking for forgiveness. - The culmination is Vidhi of Kshama (forgiveness) where people seek forgiveness from others on the day of Samvatsari. - Purpose: inner purification, renunciation of attachment, and ethical reformation.

• Chaturmas (Digambar traditions)

- The four-month monsoon period during which monks and many laypeople stay in one place, observe heightened sobriety, and often practice strict fasting or upvas. - Emphasizes restraint, study of scriptures, and moral conduct.

Notes on differences

• Paryushan is primarily a festival of confession, forgiveness, and scriptural study; it is especially important for Shvetambar followers.
• Chaturmas is a seasonal observance for Digambar and some Shvetambar communities, focusing on restraint, study, and communal practice during the rainy season.
• Both periods center on self-purification, non-violence, truthfulness, and forgiving others.

If you’d like, I can give a simple day-by-day outline for a short Paryushan plan or explain how Samvatsari forgiveness is observed in more detail.