World Time names teen climate change activist Greta Thunberg 2019 Person of the Year December 11, 2019December 11, 2019Adrianna Rodriguez, USA TODAYComments Off on Time names teen climate change activist Greta Thunberg 2019 Person of the Year This is the first time the magazine has named a teenager, making 16-year-old Greta Thunberg the youngest person to ever be named Person of the Year.