If it’s biblatex (rather than bibtex) you’re using as a biblio db input format (either with pandoc-citeproc, or by running a latex engine and biber on a .tex file calling the biblatex package), try

date = {-0349~}

For details, see the biblatex manual (in v3.9, the relevant section is “2.3.8 Date and Time Specifications”).

As to “BCE”, if using pandoc-citeproc, you’d have to include something like 

<term name="ad"> CE</term>
<term name="bc"> BCE</term>

in your CSL style file.

https://github.com/citation-style-language/schema/issues/124

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On June 25, 2018 8:57 PM, Steve Petersen <spetey-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:

Hi Pandoc experts, thanks again in advance for help.

Basically from what I can tell, BibTeX can handle year fields like

year = {circa 350 BCE}

(if, suppose, one were citing Aristotle). But I can't seem to get this to work in pandoc 2.2.1.

year = {-350}

will cite as "350BC", which is close ... but is there an easy way to get the more specific citation?

Thanks again,
Steve


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