Heres the fundamental pattern. Thanksgiving is on the 4th Thursday in November, and not on a particular date like New Years or Independence Day. These dates vary in between November 22nd and November 28th. So, my birthday is the earliest possible date for Thanksgiving.
The pattern of years in between is 6,11,6,5,6,11,6,5,6,11,6,5 and so on. Divide by 4 = 7. While I was correct about the number 7 as a youth, I did not realize that I could not simply add 7 to this years date to get the next one.
Regardless – happy birthday to me, and Happy Thanksgiving to all of you.
It really is tough to gauge at very first look. Heres why. It follows a guaranteed pattern up until leap year. All bets are off. According to one site I visited, Thanksgiving falls on November 22 an “typical” of every 11 years.
Assuming that all of the possible dates can fall in a leap year, that means the pattern is something like 1-2-3-skip, but over a sample of 7 possible dates, its hard to psychologically track. While I was proper about the number 7 as a youth, I did not understand that I might not simply add 7 to this years date to get the next one.
This year my birthday falls on Thanksgiving. It doesnt take place very frequently, however when it does its kinda fun. I was asked how often it takes place, and obviously I needed to think of it. My first thought was every 7 years (a number I came up with in my youth), but now Im interested in being more precise. As a youth I got the basic variety right, however ignored leap year.
Whoops – 2012 is a leap year, so it avoided the 23rd and goes directly to the 22nd. The range is every 7 years, however given that leap years occur every 4, we can never ever be totally in synch.
Which means (again, roughly) my birthday will fall on Thanksgiving an average of every 7 years.
According to one site I went to, Thanksgiving falls on November 22 an “average” of every 11 years.
Now, the other “milestone” that takes place on my birthday, that I actually dont like, is that it is the anniversary of John Kennedys assassination. However, thats a story for another post.
That number seemed questionable to me even though it was “voted” the very best answer. So, I kept looking (and computing).
Thanksgiving is on the 4th Thursday in November, and not on a specific date like New Years or Independence Day. The range is every 7 years, however considering that leap years occur every 4, we can never be totally in synch.
Assuming that all of the possible dates can fall in a leap year, that indicates the pattern is something like 1-2-3-skip, however over a sample of 7 possible dates, its tough to mentally track. If you look at real dates and the usage a calculator, a day will really only be avoided approximately every 28 years. But, in between, it will take place 3-4 times, depending upon the start and end dates of those 28 years.