Fiscal Year End for some companies are wrong, for example DDOG in Koyfin says FY End in March when the real date is in December, another example is PANW Koyfin shows January when in reality is July, MSFT in Koyfin shows March when the real FY end is June, I rely on this dates to be correct to be able to compare different companies to see if I have to use FY End or NTM on Revenue or Earnings and also to see in which quarter are we in right now.