Some may point out that one of the main points of weekday work is to point to the leisure of Sunday, the day of the Resurrection. We work during the week in order to better celebrate Sunday.
Therein, a day to commemorate labor and its productivity may be too much, may misplace the spotlight, and may miss the point.
But I think that celebrating Labor Day actually is quite in line and has a very good point. By not going to work today - instead, I'm at home with my family in Pennsylvania - I indeed hoped to point towards the intrinsic value of my weekday labor, which is importantly linked and points to Sunday.
Indirectly but also uniquely, Labor Day has pointed me to Sunday and therein has helped to point me to the full importance of my work.