And in the fourteenth day of the first month is the passover of the Lord.
Of course that's on the Hebrew calendar, and today is not Passover. Still, it was a bit of a coincidence to read about "the fourteenth day of the first month" on the fourteenth day of the first month.
How much of a coincidence? Well, there are 21 chapters in John, and the rest of the Bible consists of 65 books comprising 1,168 chapters. So going through the whole Bible on my system would mean reading a total of 2,533 chapters (the 21 chapters of John 65 times each, plus each of the non-John chapters once)
Seven different chapters, none of which are in John, mention the date of Passover. Thus of the 2,533 possible three-chapter readings that might happen to fall on January 14, 21 of them include a reference to "the fourteenth day of the first month." Thus, the chance of occurrence for the coincidence I observed today is in the neighborhood of 1% -- lowish but not extraordinarily low. And of course many other dates are also mentioned in the Bible (though none in John), so the chance of reading about any of those dates on the date itself would be considerably higher than 1%. If it's even as high as 3%, I should expect coincidences like this to occur about once a month. Nothing to write home about -- but, apparently, something to write a blog post about!
Update: The next day, January 15, I read the next three chapters of Numbers -- which just happen to contain the one and only biblical reference to the fifteenth day of the first month (Num. 33:3):
And they departed from Rameses in the first month, on the fifteenth day of the first month; on the morrow after the passover the children of Israel went out with an high hand in the sight of all the Egyptians.
Of the 2,533 possible three-chapter readings that might happen to fall on January 14, only one of them makes it possible to read about 1/14 on 1/14 and about 1/15 on 1/15. So this coincidence is now 21 times as impressive as I had originally reckoned!