Not only blue - collar workers but white - collar workers as well do not hae to work on labor day because it is obsered as a legal holiday in the united states and canada （不但是蓝领阶级，连白领阶级的人也一样，在劳动节都不工作，因为劳动节是美国及加拿大的国定纪念日。 ）
2.
Not only blue - collar workers but white - collar workers as well do not have to work on labor day because it is observed as a legal holiday in the united states and canada （不但是蓝领阶级，连白领阶级的人也一样，在劳动节都不工作，因为劳动节是美国及加拿大的国定纪念日。 ）
