From the Latin for ‘evening’; the evening prayer service in the Eastern Church. Because the liturgical day begins at sunset, early evening Vespers are the first service of the daily cycle of divine services.
This practice follows the Biblical account of creation: “And there was evening and there was morning, one day” (Gen 1:5).
Great Vespers are celebrated every* Saturday at 4 PM before Divine Liturgy.
*Check the bulletin, calendar or postings for any time changes around Major Feast Days.