https://nltimes.nl/2022/09/05/regional-ns-train-strikes-announced-starting-friday-northwest-west
The first strike will take place on Friday in the northwest and west of the Netherlands. Then, on 13 September, strikes will shut down the national railway in the north, south, and east. A strike on 15 September will affect the central region. “If there is still no collective labor agreement after this second strike wave, nationwide strikes will follow,” FNV said, repeating its earlier intent.