Thread:Semantic-mediawiki.org:Community portal/Meaning of "prehistoric" in the context of datatypes/reply

> I would like to know what is the meaning of "prehistoric"

Please see [0], hope this clarifies the context.

[0] https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/master/includes/dataitems/SMW_DI_Time.php#L37-L41