Jeanne Louise Calment is the only person verified to have reached the age of 120, she died in 1997, after living for 122 years and 164 days.

Right now, the oldest person is 116 years old.

In which year will the next person reach 120 years?

I will use wikipedia to check, then verify the source. The market will close when somebody becomes 200 or on January 1, 2036.