The first 100 days of the second Donald Trump presidency will begin with his inauguration on January 20, 2025 as the 47th President of the United States with JD Vance as Vice President. The 100th day of his presidency will end on April 30. The first 100 days of a presidential term took on symbolic significance during Franklin D. Roosevelt's administration, and the period is considered a benchmark to measure the early success of a president.