I think the name may have been coined in this HN thread: https://news.ycombinator.com/item?id=6146279 around August 2nd, 2013.

Google shows some uses before hand[1], but Wayback Machine does not corroborate. I think Google is using the self-reported page date and pages dynamically update with "latest news' content.

[1] http://int3.cc/collections/all