He was still using the excuse that it was his birthday yesterday, so I don't think that the timing of the event, or the late timing of responding to it, really matters to him much. 
Happy Birthday... Page 2
Thankyou very much Nil and Nick. 
I have a new excuse Scatters, I'm 18 and thus you should stop making fun of me and respect your elders.
Yes, but if we do this by mental age...
LOL. Robyn is pwned.