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The Romans named the days of the month by counting down to kalends, ides and nones. We use numbers counting up from one for the first day of the month. When did this change take place?

I assume that it was gradual, with people using the modern system when it was the more convenient, but I can find no information about who did it, nor when it happened, except a vague reference to the Roman system being in use until the Renaissance.

marked as duplicate by Comintern, T.E.D. Mar 26 '16 at 16:19

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migrated from hsm.stackexchange.com Mar 26 '16 at 15:29

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  • What does this have to do with history of SCIENCE and MATHEMATICS? – Alex Mar 12 '16 at 21:55
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    It's to do with history, and with numbers, and with your interest in astronomy as well, i'd have thought it was very pertinent. – Harry Weston Mar 12 '16 at 22:52
  • I have now asked this question on the History site, and am happy for it to be removed from here. – Harry Weston Mar 13 '16 at 16:32
  • @AlexandreEremenko - Counting days, livestock, and (much later) money is where mathematics started. – David Hammen Mar 14 '16 at 16:19
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    I'm voting to close this question as off-topic because the OP says in a comment that he has asked the question on the history site, and is happy to have it removed from here. – Michael Weiss Mar 16 '16 at 3:47

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