Registrar: Academic Calendar
Per TAMU registrar Calendar, "May 11-12 Friday-Saturday. Commencement and Commissioning." The Calendar did not mention Commencement convocation, which last few years held on Thursday, which will be May 10, 2012
It is a relatively new Texas A&M tradition in which all members of a graduating class have the opportunity to assemble together, along with family members and friends in an informal setting. It is a prelude to the degree candidates formally receiving their diplomas in subsequent ceremonies aligned by the academic colleges representing their major fields of study.
Get your hotel early. If you go online now, majority of the hotel from May 10-May 13, 2012 already block off. Call the hotel directly and you may be able to get reservation.