The Usos became the first WWE tag-team in history to hit the 600-day mark as champions during Friday's episode of SmackDown.
Fightful noted that Jimmy and Jey made some company history with their appearance - The Usos SmackDown Tag-Team Title reign is now officially past the 600-day mark. They won those belts from Rey and Dominik Mysterio way, way, way back at Money In The Bank 2021 on 18 July of that year.
The second-longest-reigning tag champs are (of course) New Day. They enjoyed a lengthy 483-day reign between 23 August 2015-18 December 2016, but that has been totally usurped by the Bloodline boys. It'd be a bit of a surprise if anybody ever matched The Usos' recent achievements in the modern era.
Jimmy and Jey are also only a week or so away from hitting the 300-day mark as Raw Tag-Team Champs too. They bagged those belts on the 20 May 2022 edition of SmackDown, and probably won't lose either set of belts until WrestleMania 39 at the absolute earliest.
That means you can probs tack another month onto the sibling's dual-reigns before Sami Zayn and Kevin Owens come knocking.