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Inauguration Day

American  

noun

  1. the day on which the president of the United States is inaugurated, being January 20 of every year following a year whose number is divisible by four. Prior to the Twentieth Amendment to the Constitution (ratified February 6, 1933), it was March 4.


Inauguration Day British  

noun

  1. the day on which the inauguration of a president of the US takes place, Jan 20

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Since Inauguration Day 2025, the S&P 500 has risen by more than 13%, according to Dow Jones Market Data.

From MarketWatch Apr. 8, 2026

American investors were humming “Hail to the Chief” last January, with stocks up in the weeks before Inauguration Day.

From The Wall Street Journal Jan. 23, 2026

Trump signed an executive order on Inauguration Day that kept the app running in the U.S.

From Barron's Dec. 19, 2025

Just before Inauguration Day, inflation data showed that the so-called shelter index—costs, including rent, mortgage payments, insurance, and utilities, that make up the biggest part of inflation—had risen for the 56th consecutive month.

From Slate Feb. 17, 2025

Inauguration Day was bitingly cold, with temperatures never going above freezing and the wind making it feel more like fifteen degrees.

From "Becoming" by Michelle Obama

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