UNB, Dhaka :The historic Mujibnagar day will be observed on Thursday to mark the formation of Bangladesh’s first government to lead the War of Liberation in 1971.Senior leaders of Awami League assembled at Baidyanathtala in Meherpur on April 17 to form the provisional government of independent Bangladesh in the absence of Bangabandhu Sheikh Mujibur Rahman who was arrested and flown to Pakistan after Pakistan military cracked down on the Bengalees on the night of March 25, 1971. Baidyanathtala, then a mango orchard, was later named as Mujibnagar.Bangabandhu was declared the first president of the People’s Republic of Bangladesh, while Vice-president Syed Nazrul Islam became the acting president in the absence of Bangabandhu.Tajuddin Ahmad was appointed the first prime minister, whileKhandoker Moshtaque Ahmed, M Mansur Ali and AHM Quamaruzzaman were named cabinet members.