Celebrating Angel baby's "birthday"

Next week we should be celebrating our baby's first birthday, but I miscarried last year. We want to do something every year to celebrate his/her birthday, but can't think of what to do. What do you all do to celebrate your angel baby?

Before any of you tell me to quit living in the past, move on, and not to celebrate someone who isn't here (surprisingly enough, I have heard all of this) just don't. First of all, that is insanely insensitive and not your call to make. Second of all, I am not asking if we should do this. I am saying that we are doing this, and looking for ideas.

I can't believe I had to add the second part, but I have come across some very rude and insensitive women in these groups.