Apple has notified developers via email that iTunes Connect, the website used to manage and submit applications, will be down for maintenance on May 14th. According to the notice, maintenance will began at 8 AM Pacific Time and last for approximately four hours. Apple does not specify if any user-facing changes will be made, but perhaps Apple is making preparations for some announcements coming in just a few weeks at the 2014 Worldwide Developers Conference. Thanks to everyone who sent this in!