When did the British Prime Minister declare to transfer power to Indians?

When did the British Prime Minister declare to transfer power to Indians?

برطانوی وزیر اعظم نے ہندوستانیوں کو بجلی منتقل کرنے کا اعلان کب کیا؟
Explanation

On February 20, 1947, Attlee announced that British rule in India would end no later than June 1948.

This declaration set the timeline for India's independence.