Day 1 (Pratham Divas) of Digambar Paryushan is mainly about starting the spiritual practice with cleansing of mind and actions. Here’s what is commonly observed:

• Take the pledge to observe Paryushan with full sincerity and restraint.
• Perform Pratikraman (confession and repentance) to reflect on past misdeeds and resolve to improve.
• Do a Samayik (meditative, vow-based session) for a set period (often 48 minutes or longer), focusing on self-control and right conduct.
• Read or listen to discourses and yejjana (swadhyaya) about Jain teachings, especially compassion, nonviolence, and detachment.
• Observe ahimsa (nonviolence), satya (truth), asteya (non-stealing), brahmacharya (celibacy/mental purity), and aparigraha (non-attachment) more strictly.
• Seek forgiveness from all beings (micchha-kshama or kshamavani) and renew commitments to ethical conduct.

Notes:

• In Digambar practice, the emphasis is on disciplined conduct and inner purification from the very first day.
• If there are local customs or family traditions, those may add additional readings or practices, but the core is confession, meditation, and vow-renewal.

If you’d like, I can give a simple day-by-day outline for the full Digambar Parushan period and point to a related Jain source that covers Digambar-specific customs.