Wow, this year marks the 20th anniversary of WordPress-it’s wild that I’ve been using it for 15 of those 20 years.
WordPress just posted a downloadable commemorative logo pack (and source files) for their #WP20 celebrations and they’ll continue to announce things for the next couple months up to the actual anniversary date (May 23).
https://wp20.wordpress.net/download-the-wp20-commemorative-logos