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 . Comment: -- Bill Clinton 's inauguration is first broadcast live on the Internet .
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 .