Too Much of It

So I was walking the hallways at the office, whistling like I usually do, and suddenly I was struck with the question: was time invented or discovered? Not that it mattered at all, but I felt compelled to find the answer. I almost checked wikipedia.

Time is a measurement, right? And yet it's pretty globally reflected in 24-hour days, roughly the same calendar year (whether you're Chinese, Mayan, or Alaskan), and those hours have sixty minutes - even in military time. So it doesn't necessitate any conversion charts from metric time - except for time zones, which are another matter altogether.

Speaking of that other matter, who decided which one counted as the first zone of the day? It's something to do with a Global Meridian Line, if I remember that much from high school science class (and I usually don't). I could move to a city sprawled across two time zones, I suppose, but that seems pointless - almost as much as the areas in Arizona and Indiana that don't observe daylight savings time.

So if time has always existed and someone merely categorized it as such, does that make it invented or discovered?

Have I mentioned this isn't remotely important?