Which leader died on the day the Non-cooperation movement was launched in 1920?

The Non-cooperation movement was officially launched on August 1, 1920. On the very same day, the prominent extremist leader Bal Gangadhar Tilak passed away. To honor his memory and channel public grief into the movement, Mahatma Gandhi and other leaders set up the "Tilak Swaraj Fund" to collect resources for the national movement.