Today is the feast of the Presentation of the Blessed Virgin Mary, recalling her dedication in the Temple by her parents, Ss. Anne and Joachim.
It's a curious feast day in that it has its origins in extra-canonical scripture, namely the Protoevangelion of James. I couldn't think of any other feast day like that; can anybody else?
In a way it reminds me of the Jewish feast of Hanukkah, with its origin in the second book of Maccabees. Because Catholic Christians accept the Old Testament of the Septuagint, while Protestants and Jews do not, this feast doesn't appear in the current version of the Jewish Scriptures. So, oddly enough, this Jewish feast appears in the Christian, but not the Jewish Scriptures. To make matters even more strange, Hanukkah also appears in the Gospel of John at verse 10:22.