>>2438975I can't really find anythign to hold either, I know for a fact her birthday in prisma is july 20thj as it comes up in one of the chapters were her, miyu, and Kuro had the same date.
It seems just about every japanese source that mentions her birthdate shows November 20th. Unless I can find a soruce fon the may 30th I would be more inclined to go with the japanese sources as it's not uncommon at all for someone to fill in a false date on western sites and the date spreads via misinformation.