the term "cake day" just makes me think of r*ddit. I've seen Lemon Day going around, but we probably want to avoid affiliation with lemon party.
not that we can tell anybody what to do anyway, and each instance could even have its own. anyway, it needs to be something that obviously means "anniversary" and doesn't require explanation otherwise it'll just be annoying
Why does it even need to be acknowledged
We need to celebrate the registration day of all citizens in order to turn an informal innocuous event into an emotional milestone for seemingly jovial purposes, until of course the platform decides to operate for profit, in which case one can then commodify these events by urging loyal citizens to buy party badges to share with the birthdayee, regardless of whether or not one actually knows said person. Its called being a good citizen, and I am all here for it. Yes.