On September 20
On September 20, the Human Saga records one pivotal event: The global climate strikes (2019).
On this day
From 20 to 27 September 2019 the world saw the largest coordinated climate protests in history, a 'Global Week for Future' that drew an estimated 6 to 7.6 million participants across roughly 4,500 locations in more than 150 countries.
Also this week in history (Sep 17 – Sep 23)
Meeting in Philadelphia from May to September 1787, delegates from the American states abandoned an effort merely to revise the weak Articles of Confederation and instead drafted an entirely new frame of government.
On 19 September 1893 the Governor of New Zealand, Lord Glasgow, signed a new Electoral Act into law, making the colony the first self-governing nation in the world to grant all adult women the right to vote in parliamentary elections.
On 18 September 1931, officers of Japan's Kwantung Army detonated explosives on a Japanese-owned railway near Mukden (Shenyang) and blamed Chinese forces, staging the false-flag Mukden Incident as a pretext for invasion.
On 17 September 2011 protesters inspired by a call from the Canadian anti-consumerist magazine Adbusters occupied Zuccotti Park in New York City's financial district, launching Occupy Wall Street.