While iTunes Connect is not available, Apple will not accept any new apps or updates, which means that all pricing changes and submissions of new apps will need to be locked before that date. for developers who want to offer discounts or new content during the holidays.
Developers tend to offer sales and promotions before closing the App Store for the holidays. These sales remain available until the reopening of the App Store in late December.
Although App Store submissions are not available, other iTunes Connect tools will remain accessible to developers throughout the holiday season.