Fagun Sud Teras (Falgun Sud Teras) is a very important Jain tithi, especially connected with Palitana (Shatrunjay hill) in Gujarat.

In simple words:

• Tithi / Date (lunar): Falgun (Fagun) Sud 13 – the 13th day of the bright half of the Falgun month, usually in February–March (Hindu/Jain calendar).
• Main Tirth: Shatrunjay Mahatirth, Palitana.
• Other names:

- “Fagun Sud Teras Yatra” - “6 Gaon Jatra / Chha Gau Yatra” – because the traditional yatra route is about 15–18 km, passing around/near six villages.

Spiritual significance

According to Jain tradition:

• On this day, Shyambh (Shyaambh) and Pradyumna attained moksha from Bhadva’s Dungar (a part of Shatrunjay hill),
• Along with about 8.5 crore (85 million) munis who also attained liberation from there.
• Because of this, the day is remembered as one on which a very large number of souls became siddha, so Shatrunjay and this tithi are considered extremely pavitra.

You can read a short JainKnowledge article on Fagun Sud Teras and this moksha-kalyanak here

How Jains observe this day (especially at Palitana)

• Early-morning yatra / climb of Shatrunjay hill.
• Many do the extended “6 Gaon” parikrama (long walking circuit of ~15–18 km).
• Darshan of Bhagwan Adinath’s main temple and other important derasars on/around the hill.
• Upvas, Ekasana, Beasana or at least very simple, saatvik food; many avoid eating till important darshans are completed.
• Extra focus on:

- Samayik, pratikraman - Bhakti, stavans, meditation on moksha - Careful ahimsa while walking (watching each step).

Because of its link with so many souls attaining moksha, Fagun Sud Teras is seen as a day to strengthen our own vairagya (detachment) and sankalp for right conduct, using the pilgrimage and tapas to move a little closer to the path of liberation.