Why are there distinct code points for the roman numerals one through twelve? https://unicode.org/cldr/utility/list-unicodeset.jsp?a=%5Cp%7Bsubhead%3DRoman+numerals%7D
I guess they've been there since Unicode 1.0, so Wikipedia doesn't have any links to the proposals for their inclusion.
12 is prolly the most subdivisions of a circle that most people can perceive.
that's my guess
sorry, you were talking about unicode (not time & clocks)
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