Shark Week is an annual weeklong programming block on the Discovery Channel focusing on shark-themed programming. It originally premiered on July 17, 1988. The block is featured annually in the summer, and was originally devoted to conservation efforts and correcting misconceptions about sharks. Over time, it grew in popularity and became a hit on the Discovery Channel. Since 2010, it has been the longest-running cable television programming event in history. The block is owned by Warner Bros. Discovery, and is broadcast in over 72 countries. Shark Week is promoted by the Discovery Channel heavily via social networks like Facebook and Twitter. Episodes are also available for purchase on services like Google Play Movies & TV/YouTube, Amazon Video, and iTunes. Some episodes of the shows on Shark Week are free on the over-the-top streaming services Max, Hulu, and Discovery+.