Just now Microsoft announced the wave of main events of next year. The expected event which brings together several tech events like TechEd and Management Summit and Exchange/Lync/Sharepoint/Project conferences into one big event. Well here it is and it is called Microsoft Ignite. Scheduled May 4 to May 8 in Chicago. Read more about it on this page:
This page also lists some of the other conferences in the year like Convergence, Build and WPC.