Some BNP leaders, led by its standing committee member Nazrul Islam Khan, placed a wreath at Koko's grave at Banani Graveyard around 10:30am on Wednesday.
They also offered fateha and joined a munajat there seeking salvation of Koko’s departed soul.
Several hundred BNP leaders and activists gathered near the graveyard, but police allowed only some party leaders to maintain social distancing rules.
Meanwhile, the party provided cooked food for orphans at Medina Nagar Madrassah in the city’s Mirpur area at noon.
BNP’s different associate and professional bodies also held various programmes, including discussion and milad mahfil, to mark the day.
Born on August 12, 1970, Koko died of cardiac arrest at the age of 45 at his rented house in Malaysia on January 24, 2015. His body was brought back home on January 27 and buried at Banani Graveyard.