Chaturmas, also called Chaumasa, is the four-month period of the rainy season during which Jain monks and nuns suspend their otherwise ceaseless wandering and remain settled in a single place. The word means "four months," and the observance spans roughly the monsoon season from the month of Ashadha to the month of Kartika, usually from around July to November. It is one of the defining rhythms of Jain monastic life and shapes the religious life of the whole community during the months it encompasses.
The origin of the retreat lies in the central Jain principle of non-violence. During the rains the earth teems with newly germinating plants, insects and tiny living organisms, and the paths and fields are covered with life that would be trampled and destroyed by an ascetic walking from place to place. To avoid causing such harm, Jain monks and nuns halt their travels for the duration of the wet season and remain in one town, moving as little as possible. This restraint expresses in the most practical terms the reverence for all life that lies at the heart of the tradition.
For the lay community the settling of the ascetics in one place is a great opportunity. Where at other times monks and nuns pass through quickly on their journeys, during Chaturmas they remain accessible for four continuous months, and their prolonged presence transforms the local religious life. Daily discourses become a regular feature, and the ascetics guide the community through scripture, doctrine and ethical teaching in a sustained way that briefer visits do not allow. Laypeople take the opportunity to deepen their study, to undertake vows and austerities under guidance, and to increase their worship and charity.
The great festivals of the Jain year fall within this period, giving the retreat a central place in the calendar of observance. Paryushana for the Svetambaras and Das Lakshana for the Digambaras are both held during Chaturmas, as are numerous fasts and vows, and the concentrated spiritual atmosphere of the four months provides the setting in which these observances unfold. Many devotees adopt special disciplines for the whole period, restricting their diet, giving up certain foods or pleasures, or committing to daily practices of worship and reflection.
The period begins with ceremonies marking the arrival of the ascetics and their formal settling for the season, and it concludes around the full moon of Kartika, when the restrictions lift and the monks and nuns prepare once more to resume their wandering life. The close of the retreat is marked by gratitude for the teaching received and by the reopening of the pilgrimage season that the rains had suspended.
Chaturmas embodies in a single institution several of the deepest commitments of Jainism: the protection of all living beings, the discipline of the wandering life, and the interdependence of the ascetic and lay communities. For the monks and nuns it is a season of stillness and intensified practice within a fixed abode, and for the laity it is a season of unusual access to their teachers and of heightened devotion. Its recurring return each year structures the spiritual life of the community around the rhythm of the seasons and renews, in the most concrete way, the tradition's founding reverence for life.