What law set the date of the Philippine Independence after a ten year transition under a Commonwealth Government?

The law that set the date of the Philippine Independence after a ten-year transition under a Commonwealth Government is the Tydings-McDuffie Act, also known as the Philippine Independence Act.

Here are the steps that led to this:

1. The Tydings-McDuffie Act was passed by the U.S. Congress in 1934. This law provided for the Philippines to become a self-governing commonwealth for a period of 10 years, after which it would be granted full independence.

2. The Commonwealth of the Philippines was established in 1935, with Manuel L. Quezon as its first president. The Commonwealth was essentially a transitional government in preparation for the country's full attainment of independence.

3. During this 10-year period, the Philippines was semi-independent, meaning it had its own constitution, president, and legislature, but its foreign affairs and military were still under the control of the United States.

4. The transition period was interrupted by the Japanese occupation during World War II. However, after the war, the transition resumed.

5. Finally, on July 4, 1946, the Philippines was granted full independence by the United States, as stipulated in the Tydings-McDuffie Act. This day is now celebrated as Philippine Independence Day.