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.

5. Strike action
UNISON members who braved the cold to join the picket line at Craigavon Area Hospital. PT03-247. Photo: Tony Hendron

6. Strike action
Wrapped up well against the cold are Unison members who joined the strike at Craigavon Area Hospital. PT03-248. Photo: Tony Hendron

7. Strike action
Members of the Universities and Colleges Union on the picket line at the Southern Regional College Portadown Campus on Thursday. PT03-249. Photo: Tony Hendron

8. Strike action
Staff on picket duty at St John the Baptist's College on Thursday morning. PT03-232. Photo: Tony Hendron

