Yes, I forgot to wish him a Happy Birthday, but to be fair, we did celebrate his birthday during the weekend; which included a "traditional" Chinese birthday dinner (see the chicken head?!), drinks at The Ritz, and some additional, unmentionable fun.
But I still acknowledge the fact that I screwed up. So what to do now? Any suggestions on how I should make it up to him? I'll probably merge all your 'good' suggestions and come up with an amazing-super-hybrid idea! Let's get cracking!