gd-IE (Gaelic) locale might be incorrect

[andrewplummer]

Hello, I have had a couple breakages for the gd-IE locale based on expected date formats... I'm actually not sure where these expectations come from and certainly no one on my team speaks Gaelic, but I noticed from some very superficial research that these long month formats seem like they might be including "dhen" which seems like it might be the word for "day" when the format is something like 21 September however shouldn't actually be part of the month when it's on it's own as in September. Again, I do not speak Gaelic, but this might be worth looking into......