Arudra Darisanam is one of the most significant Shaivite festivals celebrated at the Nellaiappar Temple. Observed in Margali (December–January), the festival honors Lord Shiva’s cosmic dance (Tandava) — a symbol of creation and destruction. The day is marked by special poojas, extended temple hours, and spiritual gatherings of devotees seeking blessings. The temple resonates with Vedic chants, classical music, and ritual deepa offerings. Many devotees regard this festival as a spiritually transformative experience, drawing crowds from Tirunelveli and neighboring districts who participate in the sacred worship.