The United States Postal Service is suspending mail delivery and the New York Stock Exchange and Nasdaq will close trading Wednesday as George H.W. Bush embarks on his final tour of Washington, the capital city that is remembering the 41st president’s lifetime of public service that began in the Navy during World War II, included one term as president and was characterized throughout by what admirers say was his innate decency, generosity and kindness.

Trump has ordered the federal government closed Wednesday for a national day of mourning. Flags on public buildings are flying at half-staff for 30 days out of respect for Bush.

The NYSE also said it will display the U.S. flag that flies above the New York Stock Exchange at half-staff in honor of the former president.

U.S. traders also observed a moment of silence before markets opened on Monday in honor of Bush.

The last time U.S. markets closed outside of a holiday was on two consecutive days in late October 2012 because of Hurricane Sandy. The last closure due to the death of a U.S. president was Jan. 2, 2007, when the markets observed a national day of mourning for President Gerald R. Ford.

President Donald Trump made the proclamation about the USPS suspension on Dec. 3.

USPS posted, "Out of respect for the 41st President of the United States and to honor his vast contributions to our country during his lifetime, and consistent with the Presidential Proclamation, the United States Postal Service will suspend regular mail deliveries, retail services and administrative office activity on Dec. 5.

"We will provide limited package delivery service on that day to ensure that our network remains fluid and we do not experience any impacts to our package delivery operations that might negatively affect our customers or business partners during the remainder of our busy holiday season."

“He was just a high-quality man who truly loved his family,” Trump said Saturday while in Argentina. “One thing that came through loud and clear, he was very proud of his family and very much loved his family. So he was a terrific guy and he’ll be missed.”

Afterward, Bush will be returned to Houston to lie in repose at St. Martin’s Episcopal Church before burial Thursday at his family plot on the library grounds. His final resting place will be alongside Barbara Bush, his wife of 73 years who died in April, and Robin Bush, the daughter they lost to leukemia in 1953 at age 3.

Bush's casket arrived in Washington Monday afternoon aboard the U.S. military airplane that's more commonly recognized as Air Force One. The crew has been tasked by President Trump with carrying out "Special Air Mission 41." The number is a reference to Bush's place in the roster of America's presidents.

Former President George W. Bush, the eldest of the four Bush sons, and his wife, Laura, along with brother Neil Bush and his family, will accompany their father's body to Joint Base Andrews outside Washington, said family spokesman Jim McGrath. Other Bush family members are expected to be at the Maryland military base for the arrival.

Bush’s passing puts him back in the Washington spotlight after more than two decades living the relatively low-key life of a former president. His death also reduces membership in the exclusive ex-presidents' club to four: Jimmy Carter, Bill Clinton, George W. Bush and Barack Obama.

One of Bush's major achievements was assembling the international military coalition that liberated the tiny, oil-rich nation of Kuwait from invading neighbor Iraq in 1991. The war lasted just 100 hours. He also presided over the end of the Cold War between the United States and the former Soviet Union.

A humble hero of World War II, Bush was just 20 when he survived being shot down during a bombing run over Japan. He joined the Navy when he turned 18.

Shortly before leaving the service, he married his 19-year-old sweetheart, Barbara Pierce, and forged a 73-year union that was the longest presidential marriage in U.S. history until her death. Bush enrolled at Yale University after military service, becoming a scholar-athlete and captaining the baseball team to two College World Series before graduating Phi Beta Kappa after just 2½ years.

After moving to Texas to work in the oil business, Bush turned his attention to politics in the 1960s. He was elected to the first of two terms in Congress in 1967. He would go on to serve as ambassador to the United Nations and China, head of the CIA and chairman of the Republican National Committee before being elected to two terms as Ronald Reagan's vice president.

Soon after he reached the height of his political popularity following the liberation of Kuwait, with public approval ratings that are the envy of today's politicians, the U.S. economy began to sour and voters began to believe that Bush, never a great communicator - something even he acknowledged - was out of touch with ordinary people.

He was denied a second term by then-Arkansas Gov. Bill Clinton, who would later become a close friend. The pair worked together to raise tens of millions of dollars for victims of a 2004 Indian Ocean tsunami and Hurricane Katrina, which swamped New Orleans and the Gulf Coast in 2005.

"Who would have thought that I would be working with Bill Clinton of all people?" he joked in 2005.

In a recent essay, Clinton declared of Bush: “I just loved him.”