With 133 posts in this thread already, all available dates in 2014 will soon be exhausted. From this point forward please specify not only a date, but also the year of your guess. If I hadn't gotten in early, I would be proud to be the first entry with a date in 2015.
Sean, I think that automatically using 2015 for the second of duplicate guesses (and there must be some by now) is the fairest way to handle them. No one wants to have to split the Lajoie card in case of a tie.
If you make a set of rules on Net54 for an auction or a contest, someone will figure out a way to break them or more likely ignore them.
Trust me.