The Revolutions of 1989 begin: The Solidarity independent labor union reaches an agreement with the communist government of Poland to restore the bicameral legislature, which had been abolished after the communist takeover in 1946.

       [added 1/21/2023]

Subsequent Events:

4/4/1989                   4/7/1989                    6/4/1989                   8/24/1989

References:

Revolutions of 1989 Chronology | Indiana University Libraries
libraries.indiana.edu/revolutions-1989-chronology

History of Solidarity – Wikipedia
en.wikipedia.org/wiki/History_of_Solidarity#Second_Solidarity_(1988–1989)

Current U.s. National Debt:

$36,167,124,467,492

Source