It will be celebrated next in January.
"Just this once. In terms of an excuse, we can blame another. We can blame the dog, the weather, or the mechanic. Tight-fitting clothes? Blame the closet fairies. If our bank account runs low before payday, the day calls for blaming someone else," the website nationaldaycalendar.com suggests.
"Go lightly into this day. If you don't want to blame someone, blame something. It's all in fun."
The website Daysoftheyear.com refers to it as "the compulsive liar's dream day."
Of course there are too many occasions to celebrate and not enough days in the year. If you're looking for something slightly more patriotic, Friday also coincides with the all-American National Apple Pie Day. It's also time to celebrate National Crouton Day, National Fruit Cocktail Day and National Frog Jumping Day.
The tradition involving the leaping amphibians dates back to author Mark Twain's first short story published in 1865.
The current frog jumping record is 21 feet and 5.75 inches, and was set in 1986 by Rosie the Ribeter.