How old is this website?

We read the year from things with a known release date: the libraries the theme ships, the builder version, the services that have since shut down.

site age example

Built around 2016

Last updated around 2019. Read from five dated signals on the page.

jQuery 1.12.42016

Bootstrap 3.3.72016

Font Awesome 4.72016

A Google+ buttonshut down

9 Nine years behind the current web.

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How the year is worked out

Every library has a release date. jQuery 1.12.4, Bootstrap 3.3.7 and Font Awesome 4.7 all shipped in 2016, so a site carrying the three was almost certainly built that year. Nobody upgrades a working theme backwards.

The rules we hold ourselves to

Two separately dated signals must agree, and the site must be three or more years old.
WordPress core files never date the build. They update with WordPress.
A rotating banner or old Internet Explorer code supports the story. It never sets the year.
Image sizes are measured, never estimated.

An old site is not a bad site. But the older the foundation, the more anything new costs to add.