Looking at the historical anniversary pages for days I think it would be more logical to order them like this:
Day of the year Holidays Events Births Deaths
With holidays moved up to the second item from the last. The reason is that the holiday is celebrated every year, so it makes more sense to have it nearer the top so it is easier to find. You could argue that everyone knows December 25th is Christmas, but to those who celebrate Christmas, that is the most significant thing about that, and you would be surprised how many people don't know that it is Christmas.
I am more then willing to start making the changes, but I would like some comments on this first so I don't start a format war.
I posted this to http://www.wikipedia.org/wiki/Talk:Historical_anniversaries/Example as well and welcome comments there.
-Jim McKeeth