i also think that (in my main, non-apocalyptic, post-s1 verse) their birthday is the first time the hargreeves all get together again after the events of season one. they’ve all hung out separately or in smaller groups in between then, but given vanya’s whole deal she was too overwhelmed and frankly a bit afraid to be around all of them again for a while, and none of them wanted to risk overwhelming her while their relationships were all so shaky.
but on their birthday everyone piles into her apartment. klaus gets there first and they have the bright idea to try and bake a cake themselves; everyone else shows up to vanya and klaus with flour all over them, desperately fanning cushions around the oven so the smoke alarm doesn’t go off and set off vanya’s powers, and she... forgets to be as nervous as she would have been. they go out and buy a cake, instead, in the end. they all sing happy birthday to each other, and allison has her voice almost all the way back, which almost makes vanya cry with relief. she gets overwhelmed halfway through, as she’s prone to when around a lot of people, and ends up sitting on the roof for a bit, but it’s still nice. eventually one or two of the others comes and sits with her, quietly, and that’s nice, too. it’s the first birthday she can remember enjoying in a really long time.















