Preparations in full swing with one day to go until Trump's inauguration

In less than a few hours, the U.S. ushers in a second Trump administration.

Lee Seung-jae covers the upcoming inauguration ceremony slated for Monday local time.

In less than a day, U.S. President-elect Donald Trump will be sworn into office, and return to the White House, four years after his election defeat to Joe Biden.

Four days of inauguration-related events kicked off on Saturday with a reception and fireworks at his golf club in Virginia, with around 500 people in attendance.

On Sunday, he visited Arlington National Cemetery, and laid a wreath at the Tomb of the Unknown Soldier.

And due to the extreme winter conditions in the U.S. capital, the inauguration day ceremony will take place indoors at the U.S. Capitol rotunda.

Monday is expected to be the coldest inauguration day in 40 years, with temperatures forecast to dip to minus 5 degrees Celsius, with winds blowing up to 48 kilometers per hour due to an arctic vortex in the region.

After Trump is sworn into office, he will make his inauguration speech before events close on Tuesday with a prayer service at Washington National Cathedral.

Despite the extreme winter conditions, supporters of Trump came to celebrate his return, with the "Make America Great Again Victory Rally" taking place on Sunday.

"I got here at 5 in the morning. And tomorrow the same. I was going to go out there now because of the freezing cold. I don't do it. I've got to do it. I've got to, I can't wait to dance that YMCA dance. I'm practicing. I'm hoping Trump will wave back."

The rally took place at the Capital One Arena in Washington, where Trump held his pre-inauguration address.

There, Trump promised to usher in a new era of American prosperity, adding that on Monday, the country will "begin a brand new day of American strength, prosperity, dignity and pride."

Meanwhile, video sharing platform TikTok said Sunday it was restoring its service.

The move comes after Trump said he would reverse a ban on the app when he returns to the Oval Office.

TikTok said in a message to users that the service would be restored "as a result of President Trump's effort."

In an interview with NBC News' "Meet the Press" on Saturday, Trump said he would "most likely" give the platform a 90-day reprieve from a potential ban in the U.S. once he takes office.

While a final decision hasn't been made, the soon-to-be U.S. leader is considering the extension for the China-based parent company to sell to a non-Chinese-buyer, or face a U.S. ban.

TikTok stopped working in the U.S. on Saturday, before a law shutting it down on the grounds of national security took effect on Sunday.

Washington had warned of Americans' data being misused by Chinese parent company ByteDance.

Lee Seung-jae, Arirang News.