I'm trying to determine the best way to model date formats in Power BI. The dates may be displayed in any number of ways by the user on an ad-hoc basis, so they may appear in tables or on charts (though for charts there is typically some understanding in the visualization of how to deal with dates). What I'm trying to set is the default format of the date in the model.
That's a lot of context for a fairly simple question, whose answer may or may not depend on context, but I'm not experienced enough to determine that. The question is, which of the following is better UX:
There is no chance that the years are going to be ambiguous to users in the foreseeable future. Does removing the first two digits of the year improve UX, harm it, or have no measurable impact? Are there any studies or applicable proven guidelines suggesting one or the other?