In 1939, on Congress Resignation, Muslim called it what day?

In 1939, on Congress Resignation, Muslim called it what day?

Explanation

The "Day of Deliverance"  led by Muslim League President Muhammad Ali Jinnah

On 2 December 1939, Jinnah put out an appeal,

calling for Indian Muslims to celebrate 22 December 1939 as a "Day of Deliverance" from Congress during the Indian independence movement.