When did President Joe Biden take office? Here's what to know about his inauguration.

President Joe Biden has been in politics for nearly 50 years. He started off as a member of the New Castle County Council in Delaware, later becoming one of two U.S. senators representing the state.

Biden served in the Senate for 36 years until he became the 47th vice president of the United States under President Barack Obama.

After four years away from political life, Biden is back in the White House - this time as the 46th president of the U.S. Here is some information about his inauguration.

When did Joe Biden take office?

Biden was sworn in on Wednesday, Jan. 20, 2021. His inauguration took place on the West Front of the U.S. Capitol, two weeks after the attacks on the Capitol on Jan. 6.

Upon his inauguration, Biden – at 78 – became the oldest president in American history.

In his inaugural address, Biden said, “Today, we celebrate the triumph not of a candidate, but of a cause, the cause of democracy."

When was Joe Biden elected?

Biden won the presidential race against former President Donald Trump on Nov. 3, 2020. He received 306 electoral votes (270 are needed for victory), winning 25 states, Washington D.C. and Nebraska's second congressional district.

How old is Joe Biden?

Joe Biden is 81 years old. He was born on Nov. 20, 1942.

How old do you have to be to be president? What running for the highest office requires.

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This article originally appeared on USA TODAY: When did Biden take office? Timeline of inauguration of 46th president