Who on here knows of anyone that has their birthday today?
If I'm right, you have a 0.273598% chance of you correctly guessing someone's birthday (excluding those that have theirs today):
(one day/days in a year)*(days in four years excluding the leap year day/total number of days in four years)
((1/365)*(1460/1461)*100)
Whereas you have 0.0684427% chance of guessing someone's birthday is today - (days in four years excluding the leap year day/total number of days in four years) - ((1460/1461)*100)