Frog Jumping Day is observed on May 13, 2018. The day has to do with Mark Twain's first short story about a pet frog named Dan'l Webster from 1865: “Jim Smiley and His Jumping Frog”. Frog Jumping Day is an unofficial holiday. In Calaveras County, California an annual Frog Jumping contest takes place since 1849. It attracts tens of thousands of attendees each year, who try to beat the record jump of 21 feet and 5 3/4 inches, set in 1986. Everyone should try at least to jump like a frog on that day or even to set up regional contests.