The city's calendar is marked by grand religious festivals that draw visitors from across the country.
* **Mangani Festival (Mango Festival):** Held between June and July, it celebrates the life and miracles of Karaikal Ammaiyar. Devotees famously throw mangoes from balconies to the crowds below in a vibrant procession. * **Sani Peyarchi:** A massive, highly auspicious festival occurring roughly every 2.5 years at the Thirunallar temple, marking the planetary transit of Saturn. Millions gather to take a holy dip in the Nala Theertham. * **Kandoori Festival:** Celebrated at the local Dargahs, marking the death anniversary of Sufi saints with processions and feasts.