On 30 June 2015 23:59:60 an additional second will be added to the clock to synchronize it with the orbit of the Sun above the Earth.
The additional second has been linked to things such the "Mandela Effect" and serious "Y2K Bug" like computer glitches.
I'm still not quite clear on the whole mandela effect. I googled it but it seems pretty ridiculous. I'm not sure how a leap second could effect that.
Some of the users on
http://mandelaeffect.com/ and /r/mandelaeffect have made some sort of correlation between leap second years and retroactive historical changes such as Jiffy to Jif, Berenstein to Berenstain, Mrs Buttersworth to Mrs Butterworth's, etc.... How this could be a result of adding a second to the last minute of June 30th (the next leap) is currently beyond me but, we'll be looking out for any changes the next day...
I, too, remember the peanut butter brand as Jiffy.
http://mandelaeffect.com/jif-or-jiffy-peanut-butter (quote below)
Julia did some research and reported:I found some new information on the Jiffy / Jif peanut butter question. The man who created what is now called Jif Peanut Butter was William T. Young, who was from Lexington, Kentucky. He also bred horses , or at least he did after Jiffy Peanut Butter and other business ventures made him very rich. I found this out in a kind of backward way. I googled “Jiffy Peanut Butter” and came across a reference to a horse of the same name. Here is the horse’s pedigree.
http://www.allbreedpedigree.com/jiffy+peanut+butterI wondered who would own a horse with the name Jiffy Peanut Butter and I’m going to make a leap and say it was most likely Mr. Young, or someone familiar to him. If you look up William T. Young on Wikipedia, it says that he created W. T. Young Foods, which developed “Big Top” brand peanut butter, which was sold to Proctor & Gamble in 1955, and became Jif. However I found this link which shows a page from “Gambling in America, An Encyclopedia of History, Issues and Society.” I don’t know when the book was published, but from the text, it was before Young’s death in 2004. And it clearly states on page 209, that Young made a fortune developing, “JIFFY Peanut Butter.”
[Edited link:
https://books.google.com/books?id=QAI9BgAAQBAJ&pg=PA209&lpg=PA209#v=onepage&q&f=false The book says: “Lexington, Kentucky, native William T. Young made a fortune developing Jiffy Peanut Butter and selling the brand to Procter and Gamble.” ]
…The name “Jif” on the label just looks weird and truncated to me, but none of my family remembered it being Jiffy. When I first noticed it, I thought it must be a name change, but supposedly not. But since there is evidence of “Jiffy Peanut Butter” having existed, it either really was changed, or there is “bleed-in” from the another reality…