In my profile it says my cake day is today (June 13), but it was displaying a cake icon on my comments all day yesterday (June 12).
The icon was a black and white outline so I thought maybe it was showing it the day before on purpose so other people would see ahead of time, and that it would turn colorful on the actual day. But then midnight hit and it disappeared, so it must be a bug instead.
Mine started showing my cake around 7pm my time on the 12th, but only in desktop. Voyager app hasn’t shown It yet. It has also shown my account as being a year old since early may on both desktop and mobile. Very strange.
Shows for me on Voyager now!