September 20

Events - Nature & Environment

1971day.year

Having weakened after making landfall in Nicaragua the previous day, Hurricane Irene regains enough strength to be renamed Hurricane Olivia, making it the first known hurricane to cross from the Atlantic Ocean into the Pacific.

Hurricane Irene, after weakening over Nicaragua, regains strength and is renamed Hurricane Olivia, marking the first known transoceanic hurricane crossing.
Hurricane Irene made landfall in Nicaragua and lost tropical storm strength on September 19, 1971. However, once it emerged into the Pacific, it reorganized and regained hurricane status. On September 20, it was officially renamed Hurricane Olivia by meteorologists. This event marked the first documented case of a storm crossing from the Atlantic basin into the Pacific. The rare phenomenon provided valuable data on storm resilience and oceanic influences. Meteorologists continue to study Hurricane Olivia to understand cross-basin tropical cyclone behavior.
1971 Hurricane Irene
2019day.year

Roughly four million people, mostly students, demonstrate across the world to address climate change. Sixteen-year-old Greta Thunberg from Sweden leads the demonstration in New York City.

Around four million people, led by teen activist Greta Thunberg, strike worldwide to demand urgent action on climate change.
On September 20, 2019, an estimated four million students and activists participated in coordinated climate strikes across 150 countries. The demonstrations, part of the 'Fridays for Future' movement, were inspired by Swedish teenager Greta Thunberg, who led the New York City protest outside the United Nations. Participants called on governments and corporations to implement policies to reduce greenhouse gas emissions and limit global warming. The scale of the strikes marked one of the largest environmental protests in history and elevated climate change to a top international priority. Leaders at the UN Climate Action Summit faced intense scrutiny from youth delegates. The global movement showcased the power of grassroots activism and the growing influence of young voices in the fight for environmental justice.
2019 demonstrate across the world to address climate change Greta Thunberg