What is the importance of Chaumasa (Chaturmas) in Jainism and how is it celebrated?

Chaturmas (Gujarati and Hindi Chaumasa, Prakrit vasavasa) is the four-month monsoon retreat that shapes the entire Jain religious year. It opens on Chaumasi Chaudas, Ashadh Sud 14 — in 2026 that is Tuesday 28 July — and closes roughly four lunar months later on Kartik Purnima.

Why Chaturmas matters

Ahimsa, made practical. The rains bring the ground alive: insects swarm, seeds sprout, and moss and micro-organisms cover every path. A monk or nun walking cross-country in that season would inevitably destroy countless one- and two-sensed beings. So the sangha simply stops moving. Ascetics suspend vihar (foot-travel) and take up varshavas, residence in a single place for the four months. The Kalpa Sutra gives this the weight of scripture: among its Samachari (rules of conduct) topics sits the Varshavas-kalpa, the rules of staying during the monsoon, set alongside the rules of begging and of keshlocha.

It keeps Mahavir's own rhythm. After attaining omniscience, Bhagwan Mahavir wandered and preached for eight months of every year and spent the four rainy months settled in one large town — Champa, Vaishali, Rajagriha, Mithila, Shravasti. Chaturmas is the sangha still following the Tirthankara's own calendar.

A settled guru means a teaching season. Because ascetics stay put, a town that receives a chaturmas gets four unbroken months of daily vyakhyan (discourse), swadhyaya and personal guidance. For most Jain communities it is the densest religious instruction of the year, which is why a sangha formally requests a guru to spend the rains with them.

How it is observed

Chaumasi Pratikraman. The Avashyaka tradition sets Pratikraman — the rite of review, repentance and asking forgiveness — at four intervals: Devasi and Rai (daily), Pakkhi (fortnightly), Chaumasi (once every four months) and Samvatsari (yearly). Chaumasi Chaudas is the day the four-monthly one is performed, closing the account of the previous four months.

Tapasya and the four-month niyam. Many keep upvas (a full fast) or ayambil on Chaumasi Chaudas itself. More characteristic is the vow taken for the whole retreat: giving up green and root vegetables, keeping chauvihar (no food or water after sunset), or renouncing a particular food or habit until Kartik Purnima.

Paryushan falls inside it. The year's greatest parva — eight days for Svetambaras ending in Samvatsari, and the ten days of Das Lakshana for Digambaras — comes in the middle of chaturmas (in 2026, 8–15 September and 16–25 September). The Kalpa Sutra is publicly recited across those days.

Daan, jiv-daya and swadhyaya. Charity and amari pravartan (the protection of life) intensify through the season. The Shraddhavidhi literature lists chaturmasik krutya, the four-monthly duties of a layperson, right beside the daily, nightly and yearly ones.

Pilgrimage pauses. Shatrunjaya (Palitana) and other great tirths close to yatra through the rains and reopen on Kartik Purnima, when ascetics resume vihar and the Shatrunjaya yatra begins again.

From our library

• Chaturmas: Aatmullas Ka Parv — Devendramuni (Tarak Guru Jain Granthalay, 1990)
• Paryushana and Kalpa Sutra — Pravin K. Shah (JAINA Education Committee, 2012)
• Shraddhavidhi Prakaran — Somsundarsuri
• Shraman Sanskruti ke Samrakshan me Chaturmas ki Sarthak Parampara — Rajaram Jain