Completed the Qi fruit quest on the last day possible, and got 4 candles burning on Grandfather's grave. Completed the Qi quest of 50 loved gifts too. The first banana tree is up and producing, so soon I'll be able to make the island obelisk. Sandy's the only "villager" left to befriend. I did get her to 7 hearts and got her recipe, so it shouldn't take long after I start to focus more on the Skull Cavern. Island farm returned to grow starfruits, and now with 4 iridium sprinklers instead of 2. 9 golden walnuts left to find, including those that I'll pay the Joja parrot for.
I've realized I made an oopsie. In my effort to complete the Qi quest, I forgot to make strawberry seeds before Spring began. Drat.
Leah's still not ready to adopt, but now that Winter's over, I can do her 14-heart event.