5th-11th makes the most sense imo. Not only does it create the fewest amount of conflicts involving school/holidays/etc. But it also hits the best point for people to check out the marathon. Most people are doing very little except getting back into the groove of the new year. All the holiday parties/sales/etc are over. College football is over (other than the title game), and in general people tend to be homebodies after traveling and spending a lot of $$$ for the holidays. Perfect time to get the most eyes and thus potential donations on the marathon.
I'll be ready to get my happy ass out there this time.
I'll be ready to get my happy ass out there this time.