Mary had a little lamb, its fleece was white as snow;
And everywhere that Mary went, the lamb was sure to go.
You may be wondering what a children’s nursery rhyme has to do with the Thanksgiving holiday tradition. It was the author of that little ditty, Sarah Josepha Hale, who launched a letter-writing campaign to have Thanksgiving declared a national holiday. Finally, in 1862, at the height of the Civil War, Abraham Lincoln made Thanksgiving Day official.