In the year 1796 because of incessant rains, the temples from Thrissur Groups (Paramekkavu, Thiruvambadi, Chempukkavu, Karamukku, Lalur, Ayyanthol, Chakkulathukavu, Neythalakavu and Kanimangalam Temples) were late for the Arattupuzha Pooram and were denied access to the Pooram procession.

Feeling embarrassed and angered by the denial, the banned temple groups complained to Sakthan Thampuran.

The Thampuran is believed to have chalked out the program and the main events of the Thrissur Pooram festival.

All the participating temples of Thrissur Pooram are present for the ceremony, and there is a light fireworks to announce the commencement of the festival.

Poora Vilambaram is a custom where the elephant pushes open the south entrance gate of the Vadakkunnathan Temple, which hosts the Thrissur Pooram, with the idol of 'Neithilakkavilamma' atop it.

[13] Even though there were several controversies, permission was granted to conduct Thrissur Pooram in 2017[14] The golden elephant caparison (Nettipattam), elephant accoutrements (Chamayam), ornamental fan made of peacock feathers (Aalavattom), royal fan (Venchamarom), sacred bells and decorative umbrellas are prepared new by Thiruvambady and Paramekkavu Devawsoms separately.

One of the major events in Thrissur Pooram is "Madathil varavu", a panchavadhyam concert, with artists numbering upto 40 members with instruments such as thimila, madhalam, trumpet, cymbal and edakka.

At 2:00, inside the vadakkumnathan temple starts the Ilanjithara melam is one of the central attractions of the pooram, consisting of drum, trumpets, pipe and cymbal.

The two groups in the presence of melam exchange colourful and crafted umbrellas competitively at the top of the elephants, called Kudamattom, which is the eye-catching attraction of the pooram.

While most of the pandal works are crafted by the Muslim community, materials for the umbrellas for Kudamattom are offered by the churches and their members.

This harmonious relationship amongst various religious groups that has been prevalent historically in the region is something Keralites are extremely proud of.

It has an important place in the tourism map of India, as tourists enjoy the beauty and traditions of this pooram.