Basij Day (Islamic Republic), Azar 5. This day commemorates the establishment of the Basij force in the Islamic Republic in 1979. The Basij was created as a volunteer organization with the aim of supporting national defense, social initiatives, and relief efforts. In the years following its formation, the Basij played a significant role in various national events, including mobilizing volunteers during the Iran-Iraq War, where a large number of its members participated on the front lines. Today, Basij Day is observed throughout Iran with ceremonies, gatherings, and cultural programs that highlight the organization's contributions. The occasion provides an opportunity to reflect on the Basij's involvement in security, social, and cultural fields, and it continues to hold a prominent place in the official calendar. Various activities are organized to showcase the achievements and ongoing work of the Basij within Iranian society. This observance was added to the official calendar in 1980 following an official directive by the founder of the Islamic Republic to establish the Basij Mostazafan force, with the purpose of organizing volunteer forces and increasing public participation in defense and social affairs. Since then, Azar 5 each year has been designated as Basij Day (Islamic Republic). According to Islamic Republic sources, this observance is registered and presented in the official calendar in this form and with these descriptions.