Racial Harmony Day is observed in Singapore every July 21 to commemorate the victims of the mass race riots that occurred in 1964. The riots began during a peaceful religious procession organized by Muslim Malays, which escalated due to tensions stirred by ultra-nationalist groups. The unrest resulted in 23 deaths, 454 injuries, and the arrest of approximately 3,000 individuals. The day serves to celebrate Singapore's rich racial diversity, with special events primarily held in schools where students are encouraged to wear their national attire. This observance highlights the importance of racial harmony in the multicultural society of Singapore.