Probably symbolic and planed like Polish 'freedoom' movement. Look at the dates:
After being tried and convicted of economic sabotage and genocide, both were sentenced to death, and they were immediately executed by firing squad on 25 December.
They like December...
Martial law in Poland was declared in the period between 13 December 1981 and 22 July 1983.
The Pacification of Wujek was a strike-breaking action by the Polish police and army at the Wujek Coal Mine in Katowice, Poland, culminating in the massacre of nine striking miners on December 16, 1981.