Paryushan is one of the most important and sacred festivals in Jainism, observed by both the Shwetambar and Digambar sects, though with some differences in duration and rituals. The festival is a time of deep spiritual reflection, self-discipline, fasting, forgiveness, and purification of the soul.

The significance of each day during Paryushan, especially as followed by the Shwetambar sect (which observes it for 8 days), is as follows:

1st Day: Preparation and Prayers

The first day marks the beginning of Paryushan. Devotees focus on self-introspection, making resolutions to observe the festival with sincerity, and seeking forgiveness from others for any harm done knowingly or unknowingly.

2nd Day: Reflection and Study

On this day, Jains engage in the study of scriptures (Agams), reflecting on their meanings, and listening to discourses by monks and nuns. The emphasis is on self-study (Swadhyay) and understanding the path of right conduct.

3rd Day: Repentance (Alochana)

This day is dedicated to self-confession and repentance for past wrongdoings (Alochana). Jains review their actions, recognize their faults, and mentally prepare to let go of negativity.

4th Day: Self-Discipline (Tapasya)

The focus is on practicing austerities (Tapasya) such as fasting, silence, and self-control to purify the mind and body.

5th Day: Forgiveness (Kshama)

Forgiveness is a central theme. Jains are encouraged to forgive others and seek forgiveness, thus reducing animosity and fostering harmony.

6th Day: Universal Friendship (Maitri)

This day is about cultivating universal friendship and equanimity, recognizing the inherent divinity in all living beings, and expressing compassion.

7th Day: Spiritual Elevation

On this day, Jains focus on uplifting their spiritual consciousness, meditating, and engaging in acts of charity and kindness.

8th Day: Samvatsari (Day of Forgiveness)

This is the most important day, known as Samvatsari. Jains perform Pratikraman (intense reflection, repentance, and atonement), seek forgiveness from all beings for any harm caused (Michhami Dukkadam), and strive to purify their souls. It is considered the climax of Paryushan.

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For the Digambar sect, Paryushan is observed for 10 days as Das Lakshana, with each day dedicated to a specific virtue (Dharma):

1. Uttam Kshama (Supreme Forgiveness)
2. Uttam Mardava (Supreme Humility)
3. Uttam Aarjava (Supreme Straightforwardness)
4. Uttam Shauch (Supreme Contentment/Purity)
5. Uttam Satya (Supreme Truth)
6. Uttam Sanyam (Supreme Self-Restraint)
7. Uttam Tap (Supreme Austerity)
8. Uttam Tyag (Supreme Renunciation)
9. Uttam Akinchanya (Supreme Non-Possessiveness)
10. Uttam Brahmacharya (Supreme Celibacy/Chastity)

Each day is dedicated to contemplation, practice, and internalization of the respective virtue.

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In summary: Each day of Paryushan is structured to guide Jains on a journey of self-purification, spiritual introspection, ethical living, and, ultimately, the seeking and granting of forgiveness. The festival is an opportunity to strengthen one's commitment to the core principles of Jainism: non-violence, truth, and self-restraint.