MacStories wrote that Apple has confirmed in an email sent to developers that iTunes Connect “the developer portal to manage applications to sell in the App Store” will be closed from December 21 to December 28. During this time, access to iTunes Connect and delivery of any apps or updates will not be available.

iTunes Connect will be temporarily shut down from Friday, December 21, 2012 to Friday, December 28, 2012, for the winter holidays.

[…]

Additionally, the following will be delayed:

Releases scheduled to appear on the App Store for the first time

Pricing changes scheduled through the interval pricing system in iTunes Connect

Source [MacStories]