In an email sent to developers earlier today, Apple has confirmed that iTunes Connect -- the developer portal to manage applications to sell in the App Store -- will be closed from December 22 to December 29.
We strongly recommend that you do not schedule pricing changes through the interval pricing system in iTunes Connect that would take effect from December 22 through December 29. Pricing changes scheduled to take effect during this date range will not be reflected in the App Store and the app will become unavailable for purchase.
We also recommend that you do not schedule any apps to go live during the shutdown. Releases scheduled with a sales start date between these dates will not go live until after the shutdown.
As with last year's shutdown, for the end user this means App Store apps won't receive updates or price changes for a week, quite possibly the most profitable for iOS developers alongside the Thanksgiving festivities in the US. Access to iTunes Connect, delivery of app updates and scheduled releases as well as price changes will be disabled or delayed between December 22 and December 29. If you're a developer, plan your Christmas app releases accordingly.