This Is Why Facebook Thinks You Have 46-Year Friendships

1969 brought us the moon landing, the Beatles’ last album and apparently a whole lot of Facebook friends, according to the social media site.

Thanks to a glitch in the social media site, users of all ages were encouraged to celebrate the 46th anniversary of their friendships on Thursday.

Facebook often alerts users to certain milestones, including the anniversaries of when two people people first friended each other on Facebook. Though the social media site has only been around for 11 years and many of its users are under the age of 46, a software bug in the site’s coding told users on Thursday that they should celebrate their almost half-century of camaraderie with certain friends.

People took to Twitter and, yes, Facebook to gleefully mock the site’s error:

Facebook released a statement saying their engineers were working to fix the problem “so everyone can ring in 2016 feeling young again.”

So what happened? Though the company didn’t offer any explanation as to how the screwup happened, Microsoft engineer Mark Davis posted his own hypothesis to Facebook:

Write to Eliana Dockterman at eliana.dockterman@time.com.