Which amendment was ratified in 1933 and caused the president elected in 1932 to not take office until March 1933?

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The amendment is commonly known as the 20th Amendment or the Lame Duck Amendment. It was ratified in 1933 and moved the presidential inauguration date from March 4th to January 20th, shortening the lame-duck period for the outgoing president. However, the amendment also included a provision that stated if the president-elect dies before taking office, the vice president-elect would become president. This provision was added after the death of President-elect Franklin Roosevelt's vice president-elect, John Nance Garner's son, who died shortly after the 1932 election but before the inauguration. As a result, Roosevelt did not take office until March 1933.

Which Amendment Was Ratified in 1933 and Caused the President