Carbon-date a website. Give us an address, then scroll down through its layers to an estimated year of construction.
Or try a known dig
How the dating works
We read one page of raw HTML and look for things with a date: library versions, copyright years, old layout habits. Those finds become the layers, oldest at the bottom.
The year on the tag is our estimate from those clues. An old library on a redesigned site will pull it too early, and a site can hide its age well.