Analysis of information sources in references of the Wikipedia article "Hindi Day" in English language version.
Ultimately, it was the pragmatic consensus-seeking approach that triumphed. On 14 September 1949, after three years of debate, the assembly overwhelmingly approved a compromise resolution, known as the Munshi—Ayyangar formula, which later became Articles 343-51 of the Indian Constitution. Instead of declaring a 'national language', Hindi was labelled the 'official language of the Union', while English was to continue to be used 'for all official purposes'. It was decided that this arrangement would apply for a period of fifteen years, during which time Hindi was to be progressively introduced into official use. What would happen at the end of this interim period was left undetermined, with the Constitution providing for the establishment of a parliamentary committee to examine the issue in the future. In addition, the Constitution recognised fourteen other languages for official use (listed in the Eighth Schedule of the Constitution). ... Fifteen years after the enactment of the Constitution, Hindi was still not widely used by the Union government. Following a series of violent riots in non-Hindi-speaking States in the 1960s, Parliament renounced the ideal of an Indian national language. In 1965, when the fifteen-year interim period prescribed by the Constitution elapsed, the government announced that English would remain the de facto formal language of India.
Partition may have 'killed' Hindustani, but it had a marked effect on the debates regarding the position of English and provincial languages in the Constitution. The Hindi protagonists became even more insistent on establishing Hindi as the sole national language and imposing it on the non-Hindi-speaking regions to enhance 'national unity'. In addition, these leaders even began to argue that the Devanagari form of numerals should be used instead of the international form. This was firmly opposed by members from South India. To solve the continuing dispute among the Assembly members, (K. M.) Munshi and N. Gopalaswami Ayyangar, a Tamil member of the Assembly, drew up detailed language provisions. These, in the words of the latter, represented a 'compromise between opinions not easily reconcilable' (Constituent Assembly Debates 1X 1966: 1319). The provisions were proposed to the Congress on 2nd September 1949 and engendered a heated discussion. It was eventually decided that they would be proposed in the Assembly by Munshi, Ayyangar, and Bhimrao Ambedkar (the Chairman of the Drafting Committee) in their personal capacities, not as an official proposal on behalf of the Drafting Committee.