July 13 – Adbusters magazine calls for a peaceful demonstration occupying wall street.
August 23 – The hacktivist group Anonymous encourages people to take part in the protest.
September 17 – The first day of the Occupy Wall Street demonstration.
September 24 – The NYPD arrests 80 protesters for blocking streets during a march.
October 5 – An estimated 5,000 to 15,000 demonstrators march from lower Manhattan's Foley Square to Zuccotti Park.
October 10 – NYC Mayor Michael Bloomberg states, "The bottom line is, people want to express themselves, and as long as they obey the laws, we'll allow them to.” The official @OccupyWallSt Twitter account declares, "Bloomberg said we can stay indefinitely! Big win!"
October 13 – Mayor Bloomberg tells demonstrators they will need to clear Zuccotti Park for it to be cleaned. In response organizers issue a call for cleaning supplies and say they intend to clean the space themselves.
October 13 – Emory University Libraries begins archiving tweets from the Occupy movement.
October 15 – Thousands of protesters march through Manhattan to Times Square to a U.S. Armed Forces recruiting station.
October 16 – President Obama extends support for the protesters.
October 26 – OWS protesters march near Union Square in support of Iraq War veteran and Occupy Oakland protester Scott Olsen who is in intensive care as a result of a police-fired projectile during the October 25 Occupy Oakland march.
November 15 – NYPD begin to clear Zuccotti Park. An official statement released by Mayor Bloomberg's office explains the purpose of the late-night eviction.
November 17 – Thousands of OWS protester march in the streets of New York City. Crowds assemble in and around Zuccotti Park, Union Square, Foley Square, the Brooklyn Bridge, and other locations through the city.
November 19 – Former Philadelphian Police Captain Ray Lewis is arrested at Zuccotti park. Newt Gingrich, former Speaker of the House, suggests OWS protesters "Go Get a Job Right after You Take a Bath."
December 17 – On the three-month anniversary of the OWS protests, police arrest 50 protesters in New York. Organizers of the protest dub it a day to "re-occupy."
December 20 – Hacktivist group Anonymous exposes the personal information of police officers who have evicted OWS protesters.
January 1 – New York police arrest 68 Occupy Wall Street protesters after they move back into Zuccotti Park. Protesters are charged with "disorderly conduct, resisting arrest, and obstruction of government administration."
January 10 – Hundreds of Occupy Wall Street protesters reenter Zuccotti Park after the barricades surrounding the park are removed. The NYPD enforces new rules that protesters are not allowed to lie down or sleep in the park.
March 17 – Occupy Wall Street demonstrators attempt to mark the movement's six month anniversary by reoccupying Zuccotti Park. Protestors are soon cleared away by police, who make over 70 arrests.
September 14 – Twitter agrees to hand over about three months worth of tweets to a judge overseeing the criminal trial of an Occupy Wall Street protester charged with disregarding police orders during a protest at the Brooklyn Bridge.
