2014 is the year for three classic children's books' birthdays.
Charlie and the Chocolate Factory  by Roald Dahl has been published in over 50 languages, made in to two movies, an opera, and now even a musical . You have until August 8, 2014 to enter the Golden Ticket Sweepstakes (put on by the book's publisher, Penguin) which could win you a trip to New York City and a year's supply of chocolate (among other things).
Harriet the Spy  by Louise Fitzhugh got mixed reviews when it came out in 1964 partly because readers were not used to seeing a bratty main character. Nobody's having a sweepstakes, but if you're going to be in New York or Massachusetts sometime this year- the Eric Carle Museum of Picture Book Art  is organizing an exhibition the original drawings for Harriet the Spy. The exhibit is at The Forbes Galleries in Greenwich Village thru May 3, 2014 and will be on view at the Carle in Amherst, Mass., May 20–November 30.
The Giving Tree  by Shel Silverstein also turns 50 years old. Interesting bit of trivia - Shel Silverstein never allowed paperback editions of his books. Most people love this book, but there are some who actually hate it (spoiler alert) because the boy is so selfish.
These three books are all classics because they are great books that everyone should read, but we could also call them classics because they've lasted so long (well 50 years is longer than *I've* been alive).