Is the "What is AM/PM called?" question on-topic?

What is AM/PM called? has been a popular question for 8 years (+164-4 votes, 8 stars), and in fact is the #1 Google hit for "What is AM/PM called?", and is also linked from the top-5 hit "What is the proper name for “AM” and “PM”?". So as far as the net is concerned, it's the primary reference for this little-known term, which does occur in programming. It stood for 8 years until it was closed by a single user for allegedly being off-topic in 2017, without any apparent debate. EDIT: and subsequently deleted in 2/2018.

Well is it on-topic per the FAQ?

• Is it "programming related"? Arguably yes, since in order to search, index or discuss a (programming) term, we'd need to know its name, and if something doesn't have a standardized or well-known name, that makes it much harder to reference it.
• The question certainly is "practical" and "answerable" (there are two well-known answers "period" and "meridiem", and each has their distinct merits)
• Note that "timestamp" is not a term specific to software either (it goes back to rubber stamps), yet few would argue "timestamp" is not software-related.
• Is it on-topic per the FAQ? The case could be made it doesn't explicitly fit the list of "on-topic" ("practical" and "answerable" yet arguably not specifically a "programming problem"), but neither does it fit any of the "off-topic examples". So, depending on how you read the above, the FAQ is either mute or somewhat positive that it's on-topic.
• There are two related MetaSO questions, not that they draw any distinction between programming-related terms (arguably on-topic) vs general word-choice/how-should-I-name-my-DB-column/thesaurus, so they seem to be too vague and emotive to be definitive reference:
  • Are “What is this thing called?” questions on-topic for Stack Overflow?
  • Is it OK to ask for a “word-choice” on Stack Overflow?
  • and the weaker question Where should I ask a question about terminology that casual users may find hard to understand?
• As a meta-meta-question, does the SO FAQ need modifying to add an explicit line saying "Questions about terminology directly related to programming are on-topic, but questions about naming objects or non-programming word choices are off-topic"?

Let's discuss (EDIT: both the closing and subsequent deletion). Please keep answers fact-based and include citations where possible.