Conflicting Season Names

[kkjbk]

While looking around on the internet I found a passage that described the Celtic seasons/festivals - they are as follows;

"The remains of a bronze calendar, found in France, mentions Beltane (1st May), which commemorates the start of summer, and Lugnasad (1st August), which would have been to encourage the ripening crops. Two other festivals, mentioned in later Irish vernacular texts, probably celebrated during the Iron Age, are Samhain (November 1st) and Imbolc (February 1st). Imbolc was possibly to ensure the fecundity of the livestock whilst Samhain celebrated the end of one year and the start of the next."

These seem different from those mentioned in EB when playing as the Casse (and possibly others, but I've only played as the Casse). I just wondered where the names for the seasons in EB came from and whether these are any better.