Our fiscal end year is June 30th. Which means that taxes are owed soon after that. Or put another way, it means earnings in June will quickly be taken away by the government. By contrast, earnings in July won't be taken away for an entire year.
Contrary to myth, corporations pay a lot in taxes. Our corporate tax rate is 39%. So we're talking well over a third going to the federal government. If they accountants are able to do their thing, the corporate rate will be 34% but either way, you're talking a LOT in taxes.
So what is the effect on "behavior"? Well, in my case, since I know my activities this month will quickly be taken away, I just don't do much. June is pretty much a dead month. No major releases. I pretty much hibernate and enjoy the weather.
You might say "Hey, good for you, take a break." And indeed, hey, I get to spend more time with my family. The office is very low stress during June. But that's at the micro level. At the macro level, it's not good for the economy and it's not good for job growth.
I know of other companies that do much the same thing. Most of the jobs in this country are created by small businesses. And by small I mean 5 to 100 employees. We're about half-way up that ladder. If I worked like I do the rest of the year, our company could probably create another two jobs each year. 2 jobs? Not much right? But taken across the country, that's a lot of jobs.
And as those jobs would be created, the opportunity for advancement at the bottom rung of the latter would move up and demand for people would increase which would push up wages naturally (without the "guvment" naively trying to force it).
But alas, that isn't the case. The tax rate is high to the point where I make the personal decision that I'm just take June easy and things go on auto pilot. Why should I work 240 hours in June when 100 of those hours are going to be going to the government. So instead I work half as many hours and enjoy the sun.