Unfortunately the Summer Patch will be delayed to thursday June 14th:
Quoted from AOEO Trajan:
I currently believe that we will be launching the Summer Update starting at 5 am PDT (GMT 1200) on Thursday, June 14. At that time, all servers will be taken offline. We expect that the servers will remain offline for 36 HOURS, or until 5 pm PDT (GMT 0000 on June 16), while we commit the update and thoroughly test the implementation.