One extra day makes the year 0.27% longer theoretically allowing for 0.27% more economic activity to take place. So it's true that all things considered you might get a smallish boost to aggregate output and income totals. But in terms of things people care about like unemployment only increasing the density of economic activities provides a boost. Taking another full 24 hours to do another 24 hours worth of work doesn't change anything.
Way overthinking it, huh?