The major portions of the Indian Constitution came into force on January 26, 1950. What historical significance did this specific date hold in the freedom struggle that influenced its selection?

Explanation

Although the Constitution was adopted on November 26, 1949, January 26 was chosen as the date of commencement because it was on this day in 1930 that Poorna Swaraj Day was celebrated, following the resolution passed at the Lahore Session (December 1929) of the Indian National Congress.