What do Hallowe'en (OCT 31) and Christmas (DEC 25) have in common beside both being festivals, one commemorating death and the other birth? I'll give you the answers at the end of this article, but the way the dates are expressed inside the parentheses is a hint.
Zerger, Monte J.
Word Ways: Vol. 29
, Article 18.
Available at: https://digitalcommons.butler.edu/wordways/vol29/iss3/18