I like to get the cookies and lemondae for my characters. So what is the last date for this year's Anniversary ? Thanks !
Factoring in Weekly content, EQ's illustrious 15th anniversary ends one week before EQ's majestic 16th anniversary.
Anniversary content will be ending in phases. Check http://everquest.fanra.info/wiki/Anniversary for what exactly you're looking for.
Don't bank on it, the 15th anniversary quests/missions still aren't in yet, they may stay up longer. Last couple of years the new anniversary quests have stuck around for 13 & 14 weeks corresponding with their anniversary year. Waiting to see if they do the same with the 15th anniversary quests and missions. I would hope the tents and vendors stay around until the 15th anniversary events are actually finished.