The main festival celebrated at Arulmigu Rajamariamman Devasthanam is Aadiuram. It is conduced yearly for 10 days in the month of Aadi of the Tamil year. The first Aadipuram (Flag raising) was celebrated on 20th July 1987.
On the 9th day, the chariot procession bearing Sri Vinayagar, Sri Murugan and His consorts followed by another Chariot carrying Arulmigu Rajamariamman are taken around the
Johor Bahru city with pomp and grandeur. The Chariot procession is highlite of this festival where about 15,000 devotees and well-wishers line the streets of Johor Bahru to witness the event.
The Chariot or Theer Festival is a unique event because it is instrumental in subduing the arrogance or egoism in a person and instilling in his mind deep harmony leading to self-realization and supreme bliss. It is believed that by participating and worshipped in Their Festival the impurities in our minds are removed and the sins that we have committed will be pardoned, as the three festival denotes the annihilative function of GOD. Annihilation here refers to annihilation of arrogance, desire and ignorance.
The Golden Chariot was a truly beautiful sight to behold. The three chariots going in procession was indeed a memorable sight to behold especially the Golden Chariot with all its unique lightings, which gave a glow of beauty as it moved. This Golden Chariot is a significant milestone in the advancement of Arulmigu Rajamariamman Devasthanam into a World Class Temple.
On the 10th day "Theerthem" is celebrated. The bronze statue of Arulmigu Rajamariamman is taken to the beach in the morning for a bathing ceremony. At night the lowering of the flag followed by Sri Bairavar Pooja and Annathanam (food) is served.