I believe its within twelve months of when you signed the conditional that you did for the airworthiness certificate. What's the date in the log book? Are they different or the same?
Annual condition inspection is due on the last day of the 12th month after either the airworthiness certificate was issued or the last condition inspection was signed off.
i.e. If the airworthiness or last condition inspection was 6/2/2012, the next condition inspection will be due on 6/30/2013.
Mel - I'm assuming you can do your Annual at any time, and then do your 12 month countdown from there. Specifically, due to weather, I want to move my Annual out of the winter and plan to do my first one early, while it's still warm.