So labor is celebrated with a day off work, isn't that contradictory
That's like a "homer day" with no anal sex allowed on that day.
2 Thessalonians 3:10 clearly states that everybody should work for his living, so a "labor day" is like a holiday for breathing or for going to the toilet.
Being a successful Job Creator on the other hand is something special, Jesus loves those who make profit with what they do (Matthew 25:14-30), so I think as Christians we should honor Job Creators, not lazy union bums