It's everyone's favourite day of the year. Except of course if you're a Liverpool fan.
On this day in 2014, prior to kick-off against Chelsea, Liverpool were in a commanding position to win their first-ever Premier League title. They'd gone on an 11-match winning streak and met up with Jose Mourinho's "little horses" at Anfield - in both clubs' 36th match of the campaign.
The Reds led Manchester City by three points before the game. They were top of the league. Victory over Chelsea would have all-but sealed the title for them too, especially considering they'd dispatched City in a 3-2 thriller at Anfield two weeks before.
One of my favourite days of the year. Happy Slippiversary! pic.twitter.com/tsCg8cWjdJ
— Scott Saunders (@_scottsaunders) April 27, 2017
That win, by the way, prompted an emotional Steven Gerrard to utter the famous words "THIS DOES NOT F*CKING SLIP NOW!" to his teammates in a post-match huddle. You literally couldn't have written what was to happen next.
Mourinho has become famed for his "tactical masterclasses" over the course of his career, and this was perhaps one of his greatest ever. The Blues stood firm, played with what was effectively a back six, and frustrated the life out of Brendan Rodgers' cohorts. But they fell behind on half time, SO IRONICALLY to a Steven Gerrard mistake. A stumble. A SLIP. A crawl along the ground.
Demba Ba was the lucky recipient as he closed in on goal, and he slid it past Simon Mignolet for the lead. The game was littered with other glorious moments - that Iago Aspas corner being one of them - and Chelsea were to double their lead in added time to put paid to Liverpool's title dreams.
Imagine the scenes if Iago Aspas knocks United out. Been great for Vigo. However he did take the worst corner of all time in England. pic.twitter.com/xRvqDjghqO
— ODDSbible (@ODDSbible) April 21, 2017
Crystal Palace and the chronicle of Crystanbul finished the job a short while after. And Liverpool have never come closer.