<li>Months are to be spelled out in the body of the article, but abbreviated in notes and in genealogical tables.</li>
<li>Centuries are to be styled “20<sup>th</sup> twentieth century”.</li>
<li>Calendar designation shall be either “BC” or “AD” whenever there may be ambiguity — AD 1957 or 3400 BC, but 2 January 201 AD. Articles set entirely in one era may omit these.</li>
<li>Endnotes are preferred to footnotes. The exception is mention of prior publication, non-Society copyright, mention of prior articles in a series, and brief author bios which go in a footnote on the first page of the article marked with an asterisk.</li>
<li>Notes shall be numbered sequentially throughout each article. Multi-part articles should use continuing continuous numbering when all parts are by the same author. Occasional exceptions apply, as with exceedingly long articles like the Germond series.</li>
<li>If footnotes are used with a Bibliography, the footnotes shall be in brief format, “Author, Short title, vol:page” with full details in the Bibliography. Note that this approach works poorly with web sources, and is discouraged when these are used.</li>