Bangladesh: Polity Style: 1971-2026

17 Apr 1971	the People's Republic of Bangladesh is proclaimed at a ceremony held at Baidyanathtala, East Pakistan (now Mujibnagar, Bangladesh) (Bangladesh Official Gazette, Part I, 23 May 1972, pp. 909-911) [1]
22 Dec 1971	the government of the People's Republic of Bangladesh is effectively established upon the arrival of its members including the Acting President and Prime Minister in Dhaka (Bangladesh Observer, No. 274, 23 Dec 1971, pp. 1. 6)
22 Dec 1971 -	Gaṇaprajātantrī Bāṃlādeś (গণপ্রজাতন্ত্রী বাংলাদেশ) (People's Republic of Bangladesh)

The proclamation of independence was dated 10 Apr 1971 and made retroactively effective to 26 Mar 1971 to honor the spontaneous attempts to proclaim independence in a series of radio broadcasts made by the leaders of resistance (see "The Declaration Of Independence On 26th March, 1971", by A. M. Abdus Sattar in The Bangladesh Observer, issue of 24 Mar 2002).