In 2019:
the dates were announced on Feb 22nd.
badges became available for sale on July 9th.
and then sold out on August 6th.
In 2018:
the dates were announce on Feb 12th.
badges became available for sale on June 29th.
and then sold out on August 5th.
Buy the damn badges when they are posted if you think there is any chance you’ll go even though they’ve generally taken a month to sell out. No idea how it being in Europe may sway that, and maybe their convention center won’t be as large too. It’s typically only been $10. I’ll probably order one myself when they are posted even though my odds of going are about 0.0001%.