If you were planning on attending Google I/O 2013 (scheduled from May 15th to the 17th), you will want to mark March 13th on your calendar. According to the official Google I/O 2013 event page, registration for the developer conference will commence at 7AM PDT on Wednesday, March 13th.

It’s impossible to know how many attendees Google will allow at I/O this year, but we have a feeling that the event will sell out just as fast as it did last year (a little less than 30 minutes). The price of the conference was raised to $900 last year, but developers were able to recuperate most of that cost with the free hardware that Google handed out during the event.

Besides Android’s Key Lime Pie update, the Motorola X phone and the upcoming replacement for the Nexus 7, what else are you hoping Google will unveil at during I/O 2013?