Kagi suggests that a particular news story is 2 days old, despite it beeing from 2016:
https://kagi.com/news?q=tihange
https://www.reuters.com/article/markets/belgium-s-tihange-2-nuclear-unit-should-restart-on-june-15-electrabel-idUSL8N1930B3/
The date should probably not describe the last change to HTML or whatever, but instead the release of the news story, especially, as I was on the news tab of kagi.
Maybe it could also be two dates, the release date and "last updated on".