Due to Pennsic starting a week early this year (July 19 - August 3), pre-registration is also closing earlier.
Mail in pre-reg ends on Sunday, May 19, 2013 11pm EDT.
On-line pre-reg ends on Sunday, June 9, 2013 at 11pm EDT.
If you have an account already, enter the info in the boxes near the top of the screen. If you don't have one, click on the "Create account" link.