D defs.my
Entry 1 sense Webster, 1913

Inauguration Day

· In·au·gu·ra·tion Day · IPA
01 The day on which the President of the United States is inaugurated, the 20th of January in every year next after a year divisible by four. …
  1. 1.
    The day on which the President of the United States is inaugurated, the 20th of January in every year next after a year divisible by four. Prior to the adoption of the twentieth amendment to the Constitution of the United States (ratified February 6, 1933) the date was the 4th of March.