Every account that logs in on Saturday, November 23rd between 12AM and 11:59PM PST will be granted 1 Friend Key invite around mid-December.
We'll be doing this for the next three weekends; so if you can't make it this weekend you'll have two more chances to do so. In addition, for each Saturday you login over the next three weeks you'll receive an additional chance to earn one bonus Friend Key through a random drawing. That's up to three extra chances to win an additional one if you login three Saturdays in a row!
To summarize:
1 Friend Key (maximum) earned for logging in during any of the next three Saturdays (November 23rd, 30th, and December 7th). One key total per person.
1 chance for an additional Friend Key earned for logging in each of those Saturdays. Maximum three chances per person, only one additional key may be earned through this.
(That's 2 friend keys TOTAL you could win by showing up all three weekends.)