I've got egg on my face because Steam's Personal Calendar feature has apparently been a test this whole time and is only now actually a fully fledged component

I'll be honest folks: I didn't know that Steam's Personal Calendar feature was still technically in testing. I've been using it here and there to keep track of what's come out recently or what's coming out imminently, and have generally found it to be fairly reflective of the kinds of games I was interested in. It just worked! Yet lo and behold, a post from Valve went out yesterday announcing that the feature has launched out of Steam Labs "and is considered a full feature of the Steam Store."
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