Trump is only the second president to be elected to two non-consecutive terms.
So what is there to know about his second inauguration.
What time is the inauguration?
The swearing-in ceremony begins at midday Washington time on Monday, January 20.
It starts at 4am AEDT on Tuesday, January 21.
It’s on at 3am Queensland time, 3.30am in South Australia, and 1am in Western Australia.
What will happen at the inauguration ceremony?
The first official proceeding of the event is the swearing-in of Vice President-elect JD Vance.
Country singer Carrie Underwood will sing the song “America the Beautiful”.
Then Trump will be sworn in, followed by his inaugural address.
Faith leaders will end the ceremony with a benediction, followed by a performance of the national anthem by Christopher Macchio.
The inauguration is not a particularly lengthy event, and how long it takes will largely be dependent on how long Trump speaks for.
How will Donald Trump be sworn in?
The swearing-in of Donald Trump will be administered by Chief Justice of the Supreme Court John Roberts.
Roberts has presided over every swearing-in since Barack Obama’s first inauguration in 2009.
The oath of office has been the same since 1884, and is constitutionally mandated.
“I do solemnly swear that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation or purpose of evasion; and that I will well and faithfully discharge the duties of the office on which I am about to enter. So help me God.”
How long will Trump speak?
The shortest address was George Washington’s second inauguration, which was just 135 words.
The longest was William Henry Harrison, who, anxious to prove he was still vigorous and energetic despite his age, spoke for 8445 words without an overcoat or gloves.
Trump’s first inauguration speech was 1433 words, which is historically on the shorter side.
Will Trump swear the oath on the Bible?
While it is not constitutionally required, Trump will likely swear the oath on a Bible held by his wife Melania.
Last time he was sworn-in, Trump used the same Bible Abraham Lincoln used at his inauguration in 1861.
But the president-elect has just endorsed a new version of his own Bible, billed as the “Inauguration Day Bible”.
This edition costs A$113 and features Trump’s name embossed on the cover.
The Trump Bible also includes the text of the Constitution, the Declaration of Independence and the lyrics to country song “God Bless the USA”.
Where does the inauguration take place?
The inauguration ceremony is held at the United States Capitol in Washington DC.
The dignitaries are seated on a platform constructed specifically for the event.
The ceremony is held facing the National Mall, a long strip of turf that runs between the Washington Monument.
Who will be at the inauguration?
Every living former president is expected to be at the inauguration, including Joe Biden.
It was highly unusual for Donald Trump to snub the inauguration ceremony of Biden in 2021 – the first sitting president to do so in a century.
As Trump takes the oath of office, he will be metres away from politicians he has repeatedly attacked in the past, Biden, Barack Obama, Bill Clinton and George W Bush.
Kamala Harris is also expected to be there, as is Hillary Clinton, in her capacity as a former First Lady.
Most world leaders will not attend the event, represented instead by ambassadors or foreign ministers.
A series of right-wing firebrand leaders from around the world have been invited: Italian Prime Minister Giorgia Meloni, Argentinian President Javier Milei, El Salvador President Nayib Bukele and Hungarian President Viktor Orban.
Former Brazilian President Jair Bolsonaro has also been invited, but will need to ask permission to leave his home country.
Bolsonaro had his passport seized in connection with his alleged role in an attempted coup.
Also invited is Chinese Premier Xi Jinping, who will not attend.
Trump will also be attending a series of events held throughout the day.
At one of the balls held on the day, The Village People have confirmed they will perform.
Trump has been raising a massive sum of money for his inauguration events, with big technology companies like Amazon and Apple writing big cheques.
The total sum is estimated to be A$274 million.
Despite the record haul, Trump’s inauguration schedule is dramatically lighter than his predecessors.
Three balls will be held at a golf club Trump owns in northern Virginia.
By contrast, Bill Clinton raised A$39 milllion in 1997 and attended 14 balls.