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.

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Inauguration Day British  

noun

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

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Example Sentences

Yet U.S. equities staged a remarkable comeback following a massive dip in April, with the S&P 500 index up 16% since Inauguration Day.

From MarketWatch • Jan. 17, 2026

Kellogg had also shrugged off an appeal from television personality Tucker Carlson, who told him before Inauguration Day that Moscow was ready to start talking.

From The Wall Street Journal • Dec. 20, 2025

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

From Barron's • Dec. 19, 2025

“You’re not healthy Dad & everyone is noticing it,” Trace wrote in a January Instagram post, days after his dad delivered a shaky performance at an Inauguration Day event.

From Los Angeles Times • Apr. 21, 2025

In addition, she was too young to run; the US Constitution requires that the president be at least thirty-five years old, and she would still have been thirty-four on Inauguration Day.

From "Votes for Women!" by Winifred Conkling