In Jain Dharma, we do Upvas (fasting) to live closer to the soul and reduce karma.

• True meaning: Upvas = “upa” (near) + “vas” (to dwell) — staying near the Self by withdrawing from sense‑pleasures and food.
• Spiritual purpose:

- Stop new karmas (samvar) by restraint and equanimity. - Shed old karmas (nirjara) through tapa (austerity), especially anashan (fasting), one of the six external austerities taught in our scriptures. - Soften passions (raag–dvesh), strengthen self‑control (sanyam), and cultivate detachment (vairagya). - Deepen dharma practices on that day: pratikraman, samayik, swadhyaya, japa of Namokar, and kayotsarg. - Support ahimsa by minimizing harm caused by eating and by reducing greed and indulgence.

How it is observed (in simple terms)

• Take pachchakkhan (a clear vow) before sunset.
• Spend the day in punya karya: pratikraman, paath, swadhyaya, silence, forgiveness, and seva.
• Break the fast (parna) with simplicity and gratitude, maintaining inner purity of intention (bhav).

Shvetambar and Digambar notes

• Both traditions value Upvas as powerful tapa for samvar–nirjara.
• Practice details can differ:

- Water: Many Shvetambar laypeople take only boiled water during fixed hours; many Digambar observe nirjala (no water) or stricter timings. - Local maryada (community discipline) and guidance from acharyas/upadhyayas should be followed.

Important cautions

• Bhav matters more than body‑show. Do it humbly, without pride or display.
• Observe only as per health, capacity, and guru’s guidance. Do not harm the body; Jain tapa is for purification, not self‑punishment.

For simple guides and pachchakkhan:

• Upvas nu Pachchhan
• Why fasting is done in Jainism (clear reasons)