Saturday, June 6, 2026

The closest calendrical approximations of pi

March 14: This is the usual Pi Day. It encodes 3.14, which is approximately 99.9493% of pi.

July 22: This encodes 22/7, or approximately 3.1429, which is about 100.0403% of pi., a slightly closer approximation than 3.14.

November 10: This is the 314th day of a common year and the 315th day of a leap year. Thus on average, it is day 314.25, encoding 3.1425, which is about 100.0289% of pi, a closer approximation still. If we limit ourselves to a single day, this is the best possible date for Pi Day.

March 14-15: Pi Biduum encodes 3.1415, or about 99.9971% of pi.

March 14-16: Pi Triduum encodes 3.1416, or about 100.0002% of pi. This three-day period is the closest calendrical approximation of pi that I can come up with.

2 comments:

Wade McKenzie said...

March 14, etc., is the obvious day, more or less, so that lends July 22 and Nov. 10 a certain intrigue as prospects. (And to think that I just made mention of the feast of St. Mary Magdalene.)

Given that this set of possible Pi days includes some notable birthdays, and we had recourse briefly to William's b-day back when we were taking a look at "The Secret Language of Birthdays", I decided to consult that venerable reference work again-- this time, 22/7. As with William's b-day, can't say I found anything especially meaningful in the text; but once again, the Tarot card's a doozy. That these Tarot cards square off as thematic extremes in the major arcana, and that the two birthdays are each very plausible candidates for Pi day... Heady stuff.

Now, with the assistance of you-know-what, I was able to learn what degree of angle holds between March 15 and July 22 (in a common year). I hope you'll indulge my desire to round off the numbers, according to the standard convention. There are two ways to formulate the prospective angle: 1) from March 15 to July 22; and 2) from July 22 to March 15. According to the former, we get 127; the latter, 233. (In a leap year, the rounded-off numbers remain the same.)

Wade McKenzie said...

What's more, we recently discussed the significance of "P" (as in black-eyed p).

Now, pi (rhymes with "pie") in classical Greek, is customarily pronounced pi (rhymes with "pea").

In order for P to resonate with "Pharazôn", it would by rights have to be phi (rhymes with "fee").