The AIA 2026 registration appears to have opened in early 2026 , but the sources I found do not give a single exact start date. One AIA event listing says, “Registration will open in early 2026,” and another AIA-related page shows the event with Early Bird Registration ends April 10 , which implies registration was already open before then.

What’s confirmed

  • The AIA Conference on Architecture & Design 2026 took place June 10–13, 2026 in San Diego.
  • Registration was described as opening in early 2026.
  • Early bird registration was active by the time the “ends April 10” notice was posted.

Best read on the date

  • Exact start date: not clearly stated in the sources I found.
  • Practical answer: registration likely opened sometime in early 2026 , before April 10.

Quick note

If you mean a different AIA event or organization, the registration timing could be different because “AIA” is used by multiple groups.