United States
On January 20, 1937, Franklin D. Roosevelt took the oath of office for his second term, becoming the first U.S. president inaugurated on January 20 under the terms of the 20th Amendment. The 20th Amendment, ratified in 1933, had moved the presidential inauguration date from March 4 to January 20 to shorten the "lame duck" period. Roosevelt’s inauguration under the new schedule signaled a constitutional shift in transition timing. He entered office during the Great Depression and promptly declared a “bank holiday” to stabilize the finances. The change affected how presidential transitions and term limits would function thereafter.
