“Teachers lose thousands of euros every year because they are not fully counted for the length of service they have completed”, states the strike notice from the platform, which includes the National Federation of Teachers (Fenprof) and the National Education Federation (FNE).

On Monday, the Prime Minister again rejected the hypothesis of a full recovery of teachers' service time, arguing that the cost "is unsustainable for the country" and that "there must be equity" for all careers in the public sector.

In response to António Costa's statements, union leaders assured that teachers will not give up and that the fight will continue.

“Abuses and illegalities in working hours are dragging on and are one of the factors causing profound physical, mental and psychological stress on teachers”, states the strike notice.

Today's strike marks the end of European Teachers' Week and takes place one day after World Teachers' Day (5 October).