One of music’s most influential couples is celebrating what may be their most important milestone yet.
Beyoncé and Jay Z have reached their eighth wedding anniversary today. While an eighth anniversary holds no traditional significance in the grand history of anniversaries, it is unique to this famous pair because of a connection to a special number as a double of four.
Months before Beyoncé declared “If you liked it, then you should have put a ring on it,” she let Jay Z slip a wedding ring on her finger and said “I Do” to her longtime boyfriend in a highly secretive ceremony on April 4, 2008—the fourth day of the fourth month of the year.
According to Bey, “4 has been my favorite number since I was a kid. It’s the number of my birthday, September 4, my mother’s birthday, January 4, my husband’s birthday, December 4 and it’s the anniversary of my wedding.”
The Carters were formerly ranked as TIME’s “most powerful couple,” Mr. and Mrs. Carter have certainly empowered each other in all realms since they became a married pair. From 2008 onwards, Jay-Z has added sixteen more Grammy Award wins to his musical resumé while his leading lady has taken home another ten. Bey’s 2013 visual album Beyoncé broke the record for the fastest-selling album on iTunes.
“He’s taught me so much about being an artist, not a musician, but an artist and fighting for what I believe and having my standards,” she said in her 2013 Life Is But a Dream documentary.
The following summer they hit the road for their first co-headlining tour, On The Run. At the time, it became the second-highest grossing tour per show in history. As the “Partition” performer sang out toward the end of each show, “Tell me why do I bring out the best in you.”
Since their wedding day, the Carters have earned more than $790 million combined and are on their way to becoming self-made billionaires in unison.