iTunes Connect closing for maintenance on May 14
A quick heads up for developers that iTunes Connect will be shutting up shop for a short time on Wednesday, May 14. Scheduled maintenance will get underway at 8 a.m. PDT and will last for 4 hours during which time iTunes Connect and content delivery will be unavailable.
Registered developers should be receiving an email confirming the details. So if it's going to affect your work, you've at least got a few days notice to re-work your plans.