'Inauguration Day' definitions:
Definition of 'Inauguration Day'
(from WordNet)
noun
The day designated for inauguration of the United States President [syn: Inauguration Day, January 20]
Definition of 'Inauguration Day'
From: GCIDE
- Inauguration Day \In*au`gu*ra"tion Day\ 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. [Webster 1913 Suppl. +PJC]