I’m guessing this is some sort of cakeday feature.
Yeah, it is. Happy birthday @ cymplecy!
It is to celebrate the date that someone joined the community.
The discourse Cakeday plugin says it’s both:
I edited so its cakeday
offtopic
Hmm, I don’t think we should collect birthday information…
You volunteer to put that in, it isn’t forced at all.
Does snap do the cake on just birthdays, or also in the join anniversary?
I’m not sure, but if they use the plug-in exactly as it is, it’s probably both.
This is what an AI recommended for a reply: I agree. Snap!'s current policy is to only ask for birth month and year locally to determine if a parent’s email is needed for COPPA compliance, and that data isn’t even stored on their servers. Keeping it that way protects our younger users.
Another offtopic cause I feel like it!!
DOUBLE SQUORK
Snap!'s Forum software is actually separate from the account system (apart from usernames). Neither your birth month nor year is stored when you create your Snap! account, but when you optionally add your birthday to your forum account, it shows your cake day on your birthday too (along with your join date). It also doesn’t have a year field, it’s just the month and date.
Omigosh, I’m so stupid.
Lemme edit that…
Done
This is one more brick in my “I hate the 21st Century” wall. When I was a high school teacher in the '80s one of the first things I did was install a birthday program that would put “Happy birthday so-and-so” in the Message of the Day if it was someone’s birthday, and nobody thought anything of it.
There were already privacy concerns about the data big faceless corporations collected about people without their knowledge, but not about the stuff you volunteered in (small, just becoming a thing) social groups.
Not any more.
Just a note that I believe this is the date someone signed into the forum for the first time. So I’m not sure it’s really relevant to anything, but also seems harmless. 
One of the bricks in my “I love the 21st Century” wall is the existence of Snap!.
Thanks! Nice to hear it.
Secrets! Anniversaries | Birthdays
I have asked “what is that cake for?” and they said, “it’s my birthday!” I don’t remember where, but it certainly seemed like it had something to do with birthdays.
It’s their 7th year on the forum!
Summary
Discourse’s Cakeday plugin with default settings uses a Birthday Cake (
) for when it’s the user’s birthday (set in user preferences), and a cake slice (
) for the day the user registered to the forum (anniversary)
Oh wow! I thought the cake was the same, that’s cool!
Interesting. Other than Jens, this is the first user to join