Benford's law doesn't apply here. It is (best) for numerical values that is spanning multiple orders of magnitude. But instead we have a fixed set of values (Jan-Dec) with no positional notation. If we were to convert the month to their numerical values and try to apply Benford' law, we would need to group the numbers for January, October, November and December to the groups of values starting with 1. That would be a bit more "benfordy", but really overshoot in other direction.

Many people are suggesting you should take into account the country of the player, but I'd say to take into account the BIRTH country of the player. Many players are "imported" from other countries.

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England, Wales, Belgium, France, Germany, Croatia, Netherlands, Poland, Portugal, Serbia, Spain and Switzerland all start in September (academics)

And that’s why your child won’t make it far, most athletes are dictated by genetics and discipline. If we go by chance and your Reddit history we can assume your offspring won’t make it far

It’s a Sankey diagram.

This should not be done by calendar month but rather relative to school year start depending on their country. A September child in a September school year is relatively the same age as a January child in a January school year.

Benford’s Law

I immediately thought of Benford’s law Considering the months as their numbers 1, 2, 3..

“A logarithmic scale bar. Picking a random x position uniformly on this number line, roughly 30% of the time the first digit of the number will be 1. A set of numbers is said to satisfy Benford's law if the leading digit d (d ∈ {1, ..., 9}) occurs with probability[10]”

A really cool episode of Connected: The Hidden Science of Everything on Netflix, explains the law really well, and has IRS help explain (elusively) how it’s used to detect fraud in real life.

Yeah no worries, we can disagree. It's a pretty visualization, just not clear (for me personally!)

This would make sense in the Southern Hemisphere where school is February to December, but makes less sense in most of the world, where school begins in August or September.

I was born in the beginning of february and my parents sent me to school a year early. Good job parents.

Having a semi-professional sport background and a cushy desk job that allows me to surf the web definitely indicates a child that will be unable to perform well in sports you are right.

It depends on the country. In Sweden where I live January is the cutoff for both schools and most sports.

It is what it is the truth hurts us all my friend

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Sad to want to give your child the best possible life with as many advantages as you can provide?

This is sad.

So you just woke up and chose violence? Perhaps one of the most useless comments I have ever read, thanks for the invaluable input.

I think what's really important is motivation.

Well good news is if you are perusing Reddit and not busy doing something else then your child most likely won’t advance far into competitive sports so feel free to have it whenever

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My twin brother and I repeated 1st grade and I always wonder if that was responsible for our academic success. Always being a year older is a huge advantage when you're a kid. Definitely helped in sports too because I hit puberty a grade early and was like 6in taller than my peers in middle school.

Sorry man, I appreciate the feedback however I don't agree. If you are making any visualization which is not a "conventional" one like a pie chart or bar chart, it's a good idea to include a "how to read" or some explaining legend as people have different data literacy skills. It's very common even for the best creators in the industry (I'm obviously not in that group) to include a how to read section. With your last point I agree though, there is always room for improvement :)

That's true, however, I specifically filtered to incidents where there were victims (injuries or death) plus the person who committed was a student or former student and the cause of shooting was NOT accident. This was I tried to filter the "actual" intentional school shootings from the very extensive database.

For academics September is the relative age effect start point. Most sports in Northern Europe work the same way Football 100% does so here in the UK