In 10 days I'm staying at BWV as a birthday present to myself (and kinda sorta for my sister whose 26th birthday is 16 days later, and who will be staying with me).
I did online check-in today (because I'll be arriving really early and wanted to have them prepared to see me at 9am) and tried to "Add a Celebration" to note that it's a birthday trip, but it wouldn't let me save the information. I had every single field filled in except "list the name if the person is not already shown", and it absolutely would NOT let me click to save. I could only cancel. I tried going back to add it later, but of course it wouldn't let me.
So what exactly does putting down that it's a birthday trip do? I've got it on my dinner and lunch reservations (because I'll have to kick myself really hard in the knees if I miss out on birthday singing to embarrass myself with), but those aren't necessarily attached to the trip reservation. Is it just a ready-made birthday button when you collect your KTTW card? (and if so, I'd probably have to kick my brother in the knees for making the reservation with my legal name instead of my use name, because he's a meaniebutt, but luckily that's not the case, since I couldn't add the celebration. and i could get a new one anyway.)