tldr gemini asserts they are converted dates.

My colleagues do this as well with AI and it fucks me right off.

They just present the raw output, in its long form an expect everyone to follow the flow. Context is everything, damn it.

Looking into it further there isn't really a mystery as to what they are, or at least none that I could find suggesting that its unknown. Especially given the context of the page.

Its great that gemini can do this, its a shame that lots of the ancillary "analysis" about the writing doesn't appear to be correct (humanist minscule I would suggest is too new, too heathen and too Italian for a german manuscript of the time https://medievalwritings.atillo.com.au/whyread/paleographysu...)