Question: When does the sit-in street protests opposed by Politihk Social Strategic occurred?
Context: Occupy Chicago was an ongoing collaboration that has included peaceful protests and demonstrations against economic inequality, corporate greed and the influence of corporations and lobbyists on government which has been taking place in Chicago since September 24, 2011.  The protests began in solidarity with the Occupy Wall Street protests in New York. Politihk Social Strategic () is a political organisation in Hong Kong founded by a group of pro-government activists in 2016 who opposed the 2014 Hong Kong protests and support the Leung Chun-ying administration. A wave of demonstrations and civil unrest in Turkey began on 28 May 2013, initially to contest the urban development plan for Istanbul's Taksim Gezi Park.  The protests were sparked by outrage at the violent eviction of a sit-in at the park protesting the plan.  Subsequently, supporting protests and strikes took place across Turkey, protesting a wide range of concerns at the core of which were issues of freedom of the press, of expression, assembly, and the government's encroachment on Turkey's secularism.  With no centralised leadership beyond the small assembly that organized the original environmental protest, the protests have been compared to the Occupy movement and the May 1968 events.  Social media played a key part in the protests, not least because much of the Turkish media downplayed the protests, particularly in the early stages.  Three and a half million people (out of Turkey's population of 80 million) are estimated to have taken an active part in almost 5,000 demonstrations across Turkey connected with the original Gezi Park protest.  Eleven people were killed and more than 8,000 were injured, many critically. Occupy Berlin was a collaboration in Berlin, Germany that has included peaceful protests and demonstrations against unregulated financial markets and other alleged social injustices.  It began as a part of the 15 October 2011 global protests.  The protest began in solidarity with the Occupy Wall Street protests in New York, United States.  It has established three encampments: outside of the church Parochialkirche, in Boxhagener Platz and the biggest one on the Bundespressestrand. Occupy Ashland included a peaceful protest and demonstration against economic inequality, corporate greed and the influence of corporations and lobbyists on government which has taken place in Ashland, Oregon, United States since 6 October 2011.  The protests began in solidarity with the Occupy Wall Street protests in New York.  The protests included an occupation of the downtown Plaza and a daily picket outside the JPMorgan Chase branch in Ashland. The Occupy Wall Street protests have inspired a wide international response.  There have been hundreds of Occupy movement protests worldwide over time, intended and organized as non-violent protest.  This is a list of some of their locations.  Months before the Occupy movement began, the Movimiento 15-M planned to hold events in many nations on October 15, 2011.  The Occupy movement joined in and also held many events in many nations on that day.  A list of proposed events for the 15 October 2011 global protests listed events in 951 cities in 82 countries.  Reportedly the large manifestation in Rome ended in violence.  Protest camps were built at many of the protest locations from Honolulu to Zeulenroda, often near banking institutions or stock markets.  Many locations had further manifestations at the following weekends until "Guy-Fawkes" day since the Guy Fawkes mask had become protester fashion.  Many US-American Occupy groups kept activity alive until spring 2012, some are still active. A series of sit-in street protests, often called the Umbrella Revolution () and sometimes used interchangeably with Umbrella Movement (), occurred in Hong Kong from 26 September to 15 December 2014.  The protests began after the Standing Committee of the National People's Congress (NPCSC) issued a decision regarding proposed reforms to the Hong Kong electoral system.  The decision was widely seen to be highly restrictive, and tantamount to the Chinese Communist Party's pre-screening of the candidates for the leader of Hong Kong. In 2014, a series of protests, political demonstrations, and civil insurrection began in Venezuela due to the country's high levels of urban violence, inflation, and chronic shortages of basic goods attributed to economic policies such as strict price controls.  While protests occurred in January 2014, after the murder of actress and former Miss Venezuela Mónica Spear, mass protesting began in earnest that February following the attempted rape of a student on a university campus in San Cristóbal.  Subsequent arrests and killings of student protestors spurred their expansion to neighboring cities and the involvement of opposition leaders.  The year's early months were characterized by large demonstrations and violent clashes between protestors and government forces that resulted in nearly 4,000 arrests and 43 deaths, including both supporters and opponents of the government.  Toward the end of 2014, and into 2015, continued shortages and low oil prices caused renewed protesting.  By 2016, protests occurred following the controversy surrounding the 2015 Venezuelan parliamentary elections as well as the incidents surrounding the 2016 recall referendum.  On 1 September 2016, the largest demonstration of the protests occurred, with over 1 million Venezuelans, or over 3% of the entire nation's population, gathered to demand a recall election against President Maduro, with the event being described as the "largest demonstration in the history of Venezuela".  Following the suspension of the recall referendum by the government-leaning National Electoral Council (CNE) on 21 October 2016, the opposition organized another protest which was held on 26 October 2016, with over 1.2 million Venezuelans participating.  After some of the largest protests occurred in a late-2016, Vatican-mediate dialogue between the opposition and government was attempted and ultimately failed in January 2017.  Concentration on protests subsided in the first months of 2017 until the 2017 Venezuelan constitutional crisis occurred when the pro-government Supreme Tribunal of Justice of Venezuela attempted to assume the opposition-led National Assembly and removed their immunity, though the move was reversed days later, demonstrations grew "into the most combative since a wave of unrest in 2014".  The protests are considered to be the Mother of all Protests. Occupy Oslo was a collaboration, peaceful protest and demonstration against social injustice, corporate greed and the influence of corporations and lobbyists on government.  It occurred in Oslo, Norway, and started as a part of the global protests of October 15th, 2011.  The protest began in solidarity with the Occupy Wall Street protests in New York, United States, and is a part of the global occupy movement. The protests in Saudi Arabia were part of the Arab Spring that started with the 2011 Tunisian revolution.  Protests started with a self-immolation in Samtah and Jeddah street protests in late January 2011.  Protests against anti-Shia discrimination followed in February and early March in Qatif, Hofuf, al-Awamiyah, and Riyadh.  A Facebook organiser of a planned 11 March "Day of Rage", Faisal Ahmed Abdul-Ahad, was allegedly killed by Saudi security forces on 2 March, with several hundred people protesting in Qatif, Hofuf and al-Amawiyah on the day itself.  Khaled al-Johani demonstrated alone in Riyadh, was interviewed by BBC Arabic Television, was detained in `Ulaysha Prison, and became known online as "the only brave man in Saudi Arabia".  Many protests over human rights took place in April 2011 in front of government ministry buildings in Riyadh, Ta'if and Tabuk and in January 2012 in Riyadh.  In 2011, Nimr al-Nimr encouraged his supporters in nonviolent resistance.
Answer: 26 September to 15