Added the Fiscal Week based on the logic you’ve provided, see this article, it requires a FYStartMonth and FYStartOfWeekDayName . Note that this can create partial weeks around the FY Start and End date. And another thing to note, that in the DAX code there’s a misalignment in FY this is sorted in the M code.
Also added MonthInitial and DayOfWeekInitial columns that use the the M function Character.FromNumber to add a unicode Zero-Width Space character if a letter isn’t distinct.
@BrianJ,
if you want to update the Cheat Sheet for Extended Date Table.
MonthInitial should be sorted by MonthOfYear and
DayOfWeekInitial sorted by DayOfWeek