Ask HN: Do you take holidays off?

In the USA, today is a holiday and most people are off work.

Like many people on HN (I suspect), I have too much work to do and too little time to do it. So instead of resting, today I am trying to be as productive from home as I normally am from my office. I'm always unsure whether this a good decision.

How do you know whether to take a day off or work instead? What are the factors that influence your decision? And are you working for your normal job, a side project, or a new startup?