<p>In New York City, the cutoff is actually at the end of the calendar year, not the academic year. I don't know where else this is true (if any), but that might throw off the OP's theory if there are many places.</p>
<p>January: 1
February: 7
March: 4
April: 3
May: 6
June: 4
July: 3
August: 2
September: 3
October: 2
November: 2
December: 3</p>
<p>Sept-Dec: 10
May-Aug: 15</p>
<p>January: 1
February: 8
March: 4
April: 3
May: 6
June: 4
July: 3
August: 2
September: 3
October: 2
November: 2
December: 3</p>
<p>Ironic how the shortest month has double the birthdays of any of the other months (except May). Feb 21 here.</p>
<p>January: 1
February: 8
March: 4
April: 3
May: 6
June: 4
July: 3
August: 2
September: 4
October: 2
November: 2
December: 3</p>
<p>I'm a September baby but in age, I'm a year behind my classmates. Most of my friends are over 18 whereas I just turned 17.</p>
<p>January: 1
February: 8
March: 4
April: 3
May: 6
June: 4
July: 3
August: 2
September: 4
October: 3
November: 2
December: 3</p>
<p>October baby. I share birthdays with an absurd amount of people I know. And Hillary Clinton.</p>
<p>January: 0
February: 2
March: 2
April: 3
May: 3
June: 1
July: 2
August: 0
September: 0
October: 1
November: 1
December: 0</p>
<p>January: 1
February: 8
March: 4
April: 3
May: 6
June: 4
July: 3
August: 3
September: 4
October: 3
November: 2
December: 3</p>
<p>January: 1
February: 8
March: 4
April: 3
May: 6
June: 4
July: 3
August: 3
September: 4
October: 3
November: 2
December: 4</p>
<p>January: 1
February: 8
March: 4
April: 3
May: 6
June: 5 <---
July: 3
August: 3
September: 4
October: 3
November: 2
December: 4</p>
<p>January: 1
February: 8
March: 5 <---
April: 3
May: 6
June: 5
July: 3
August: 3
September: 4
October: 3
November: 2
December: 4</p>
<p>^ looks like the theory is totally bunk so far, although we have extremely limited data hahaha</p>
<p>January: 1
February: 8
March: 5
April: 3
May: 6
June: 5
July: 3
August: 3
September: 4
October: 3
November: 2
December: 5<--</p>
<p>January: 1
February: 8
March: 5
April: 3
May: 6
June: 5
July: 3
August: 3
September: 4
October: 3
November: 2
December: 6<--</p>
<p>January: 1
February: 8
March: 5
April: 3
May: 7
June: 5
July: 3
August: 3
September: 4
October: 3
November: 2
December: 6</p>
<p>January: 1
February: 9 <---
March: 5
April: 3
May: 7
June: 5
July: 3
August: 3
September: 4
October: 3
November: 2
December: 6</p>
<p>somehow this got screwed up because the numbers have decreased in some months, most notably January</p>
<p>January: 1
February: 9
March: 5
April: 3
May: 8 <<<<
June: 5
July: 3
August: 3
September: 4
October: 3
November: 2
December: 6</p>
<p>January: 3
February: 9
March: 5
April: 4
May: 8
June: 5
July: 3
August: 5
September: 8 <-----
October: 5
November: 2
December: 6</p>
<p>tried to fix it</p>
<p>January: 3
February: 9
March: 5
April: 4
May: 8
June: 5
July: 3
August: 5
September: 8
October: 5
November: 3 <<<<
December: 6</p>
<p>January: 3
February: 9
March: 5
April: 4
May: 8
June: 5
July: 3
August: 6
September: 8
October: 5
November: 3
December: 6</p>