Question

why was the constitution of India is adopted on 26 January 1950​

Answer 1

we thought we will get independence on 26 January as our first movement for independence took place.but the British left us on 15 August to fulfill our wish we adopted our constitution on 26 january

Answer 2

Here is your answer.

The reason January 26 was picked as the day for the constitution to come into force is because in 1929, during the Lahore Session of the Indian National Congress, where Jawaharlal Nehru was elected president, a resolution was passed demanding complete independence for the first time.