The 8th. But I had my Lego Party the 7th because the next day was the Texas A&M vs Texas Tech game that I had to go to. Only a few people built stuff and I haven't taken any pictures, so I've not got anything to post.
What I did was pick up some of the latest CFMs and then had the others I already owned laid out on playing cards. Then I had people either pick one from the bowl, or from another deck of cards. Everybody was supposed to build a vig that went with their minifig. Those that built did, the others just hung out & chatted with everybody else. The best was a 1/2 pipe someone built for the snowboarder.