Healthcare workers, teachers, civil servants and bus and train drivers are among those taking part in strikes with members of 16 unions involved.
There was a strong turnout of workers around the local picket lines, despite the bitterly cold weather.
Here are some of the scenes as workers join the Province-wide show of strength.

21. Strike action
Nipsa Lurgan NICS workers supporting the strike. Photo: Craigavon Trades Council

22. Strike action
Drumgor PS staff in Craigavon were among those taking part in Thursday's strike. Photo: Craigavon Trades Council
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