No documented founder or formal establishment record has been identified for National Eric Day. The widely repeated claim that it honors Erik IX of Sweden is unsupported, and his feast day falls on 18 May.
Three books, three different rulers
Three standard reference works take the same Old Norse name, Eiríkr, and pull it apart three different ways. Behind the Name splits it into ei, "ever, always," and ríkr, "ruler, king," and glosses the whole thing "ever ruler". The Online Etymology Dictionary reaches for a different root entirely, the Proto-Germanic aiza, "honor," and arrives at "honored ruler".
Isof takes a third path. Its first element is aina, "one, alone," and the reading it says has won the widest recent acceptance is "the one mighty above others." An eternal ruler, an honored ruler, a singular one: the books cannot agree on what kind of power the name is claiming.


