St. Paul’s (get map) will be offering a Vesperal Liturgy commemorating the Entrance of the Theotokos, at 6:30pm on Wednesday, November 20.

From Orthodoxwiki:

The Entrance of the Theotokos into the Temple, also called The Presentation, is one of the Great Feasts of the Orthodox Church, celebrated on November 21.

According to Tradition, the Virgin Mary was taken —presented—by her parents Joachim and Anna into the Jewish Temple in Jerusalem as a young girl, where she lived and served as a Temple virgin until her betrothal to St. Joseph. One of the earliest sources of this tradition is the non-canonical Protoevangelion of James, also called the Infancy Gospel of James.