I know there have been other discussions, but I don't see this particular difficulty addressed. Ancient artworks often have a "circa" attached to the date (e.g. "c. 470 BCE).

I know folks use the Extra field as a work-around, but when I enter
Date: c. 470 BCE in the Extra field, the bibliographic output simply renders it as "470 BCE" (that is, as a certain date). If I spell out the entire word "circa" in the Extra field (e.g. "circa 470 BCE"), the bibliographic output renders it as "470 BC?" as though its a dubious date.

Is there ANY WAY to get Zotero to output dates of ancient artworks exactly as every museum and classical academic source does, as "c. 470 BC" rather than as a firm date (470 BCE) or a dubious question mark (470 BC?) ?

I hope this distinction is clear, but if not, I will happily provide screenshots.