By the Numbers: Presidential inaugurations By Caitlin Stark, CNN Library January 17, 2013 -- Updated 1605 GMT (0005 HKT) 7 -- The number of times the constitutionally-mandated inauguration date has fallen on a Sunday. Up to 800,000 -- Estimated number of people that will attend Obama's second inauguration. More than 1.8 million -- Estimated number of people that attended Obama's first inauguration. 1997 -- Bill Clinton's inauguration is first broadcast live on the Internet. (CNN) -- The oath, the speech, the crowds, the celebrities, the balls. Every four years Washington celebrates the start of another presidential term. By the numbers, here's a look at presidential inaugurations. January 20, 2013 -- The date President Barack Obama will be sworn-in to his second term. The public ceremony will be held on Monday, January 21st. 56 -- Number of formal presidential inaugural ceremonies held since 1789. Obama's upcoming inauguration will be the 57th. 69 -- Number of times the U.S. president has taken the oath of office. Up to 800,000 -- Estimated number of people that will attend President Obama's second inauguration. More than 1.8 million -- Estimated number of people that attended President Barack Obama's first inauguration on January 20, 2009. Historical Facts 1789 -- Date of the first presidential inauguration, that of George Washington. It was held at Federal Hall in New York City. 6 -- The number of times the president has been inaugurated or sworn-in outside of Washington. 135 -- Number of words in George Washington's second inaugural address, the shortest on record. 8,445 -- Number of words in William Henry Harrison's inaugural address in 1841, the longest on record. Harrison died one month after his inauguration, possibly from prolonged exposure to bad weather during his swearing-in. $4 -- The cost to attend the first inaugural ball, held in 1809 for President James Madison. 1821 -- The first year that the presidential inauguration fell on a Sunday. President James Monroe consulted with the Supreme Court and agreed that ceremonies would be held on Monday. 1901 -- The first year that the House of Representatives was involved in preparations for the inauguration. Since that date the Joint Congressional Committee on Inaugural Ceremonies has organized the inaugural ceremonies. 4 -- The number of outgoing presidents who did not attend the inauguration of their successors. Technological Firsts 1857 -- James Buchanan's inauguration is believed to be the first to be photographed. 1897 -- The inauguration of William McKinley is the first to be recorded by motion picture cameras. 1949 -- President Harry Truman's inauguration is the first shown on television. 1997 -- The inauguration of President Bill Clinton is the first broadcast live on the Internet. 2013 Presidential Inauguration Ahead of the inauguration, the nation is is also regrouping. What it does differently this time could indicate what America will emerge. January 15, 2013 -- Updated 0033 GMT (0833 HKT) CNN's Brian Todd reports on the rehearsals and crowd-control measures being taken ahead of the inauguration. January 16, 2013 -- Updated 2001 GMT (0401 HKT) Police will shut down dozens of downtown Washington streets and parking will be even tighter than usual. How will you navigate the gridlock? It's tempting to dismiss talk of Michelle Obama's wardrobe as frivolous, but her panache for mix-and-match takes it to the next level. January 15, 2013 -- Updated 1545 GMT (2345 HKT) Pres. Obama's inauguration will be on MLK Day. The Civil Rights leader's son tells Carol Costello why this is special . Katy Perry, John Legend, Stevie Wonder, and Alicia Keys are just a few of the many celebrities expected to perform at the inaugural festivities. January 16, 2013 -- Updated 0421 GMT (1221 HKT) Watch history unfold as Barack Obama becomes the 44th President of the United States of America.