Social media network Facebook is good for alerting people of important events.
The networking site is popular, in part, for reminding users of friends and family members' birthdays and other significant dates that are easy to forget.
One feature reminds users how long they've been friends with each other.
The message looks like this:
"You and (insert name here) became friends on Facebook (insert number) years ago today. We thought you'd like to look back on some of the memories you've shared together."
Pictures of the two users show a small collage of some of the moments the Facebook friends have shared over the years.
But on Dec. 31, a Facebook glitch congratulated many users on celebrating 46 years of friendship with their online connections.
Users, many of whom were younger than 46, took to social media to voice their confusion.
Ultimately, a Facebook representative told Mashable, "We've identified this bug, and the team's fixing it now so everyone can ring in 2016 feeling young again."
Before receiving a statement from Facebook, some thought the glitch may have been related to how many computers keep time, which is measured by how many seconds have elapsed since Jan. 1, 1970 — 46 years ago on Friday. This process is referred to as Unix time.
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