Spontaneous labor strikes breakout in communist Poland against draconian price increases for food decreed by Prime Minister Wojciech W. Jaruzelski.
Postscript: The strikes ended five months later only after Jaruzelski agreed to recognized the banned Solidarity independent labor union.
[added 1/20/2023]
Subsequent Events:
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)