I've been trying to do a timeline of dates with vis.js-timeline that are BC or before 0.
Tried start: '-0050-01-1' and start: '-50-01-1' and they don't show.
Couldn't find documentation on this.
So reading the object of Expanded Years from ECMAScript 2022 Language Specification found that:
In the simplified ECMAScript format, such an expanded year representation shall have 6 digits and is always prefixed with a + or - sign.
Tried '-000460-04-20' and it shows as -460 (BC).