I actually wondered how the US Open ending on Fathers' Day would affect Tiger--i.e. did thoughts of winning on Fathers' Day and having to answer some press-conference question about his kids not being there come into play? We'll never know obviously.
Didn't realize it was his daughter's birthday -- although i'd bet he wasn't invited to the party; and if so, and if i were in his shoes, i'd be pretty bummed out about the whole situation, as the holiday will always serve as a reminder that his actions make him a cr*ppy dad.