A Series of Questions About The Calendar

I'm so very grateful that it's Friday, because I really need one of these days coming around every week. But it does make me wonder about questions that have been raised throughout "history" - probably more often by kids but questions, nonetheless. 

I guess I'm in a questioning mood today. Here are some
questions for all of you on this early Friday morning. 

Like why do we have seven days in a week? I know how the basic span of annual days arises - it's hard to fight (successfully) with Mother Nature, and the celestial calendar is pretty sturdy and somewhat reliable ... yeah, that! LOL But weeks don't really have to be seven days long. 

Want a more detailed explanation of the seven-day
week as well as a dive into one time period when
it was abandoned? Just follow this link. 

I understand the basic 24 hour structure, or at least the basic concept of splitting time into discrete segments stretching from sunrise to the next sunrise. Of course, sunrise is always changing, days could as easily be made from a format of 30 hours or 20 hours or even 18 hours. Why 24? Some dude in power somewhere probably decreed this and everyone else followed like little mice because you don't want to piss off the ruler. 

Why are there 24 hours in a day? It hasn't always been that way.
Interested in a more in-depth explanation? Follow this link. 

Seasons are pretty straightforward, especially for agricultural societies. You plant in the Spring, grow throughout the Summer, harvest in the Autumn, and starve and prepare for the next year in the Winter. Food shortages are dependent on the previous year's harvest, the number of mouths to feed, and other factors such as how harsh the winter is from year to year. 

Seasons are harder because they are location dependent. In the USA we
are focused on a calendar to tell us when a new season has started. Other
areas of the world depend on other factors such as temperature. Find
out more by following this link. 

Which brings us to the year - the annual run of days which, in many places today is stretched and altered by adding a few days every so often, allowing us to stutter-step back into synch with the Universe. Hmmm - rather arbitrary, but necessary to keep May in the Spring and September in the Fall. 

Fridays are usually pretty good days, all told. I'm going to
try and enjoy this one. 

So my question still stand. Why Friday? Why only seven days instead of a different number. Why, why, why? The questions that occur under fire to an exhausted mind. Have a wonderful Friday despite the questions and I'll return tomorrow unless I freeze into a pillar of me in today's cold snap. Stay warm, stay happy, and enjoy the day!