Avogadro's Constant and the 2038 Unix Overflow

This is something I've never seen mentioned anywhere else, and I want to put it out there for the record.

On May 20, 2019, the SI base units were redefined, and Avogadro's number — the number of atoms or molecules in one mole — was fixed by international agreement to:

6.02214076 × 10²³

Those digits are exact. They're no longer based on measurement or experiment — this number is now part of the definition of the mole.

Here's the strange part:

If you look at the decimal portion — 02214076 — it contains the sequence 221407.

That number might look familiar if you've worked with low-level systems or old Unix-based code. It's the exact time, in 24-hour format, of the 2038 problem — the moment the 32-bit Unix time value (2,147,483,647) overflows.

2038-01-19 03:14:07 UTC

In EST, that's 2038-01-18 22:14:07 → 221407

So to be perfectly clear:

The fixed digits in Avogadro's number, established in 2019, contain the exact time the Unix clock will overflow — to the second.

To those who have been regulars on this site, you may know that the web comic and visual novel "2214" is based on the abstract concepts derived from a certain set of coincidences surrounding a dream from March 11, 2000 where I saw the number "2214".

I'm not making a claim about what this "means." I just find it incredibly unlikely. The odds of a random 8-digit number containing a specific 6-digit sub-string are about 1 in 1,000,000. And yet here it is — linking a universal physical constant to a very specific moment in computing history.

As far as I can tell, no one else has written about this. If you've seen it mentioned elsewhere, let me know. Otherwise, consider this a time-stamped note.