The principal troparion (hymn) of the day, chanted at the end of Vespers (hence its name, which means “dismissal hymn”), and celebrating the particular feast or saint being commemorated. It is also known as the “troparion of the feast” or the “troparion of the day”. On Great Feasts it is sung three times at the end of Vespers, four times at Matins: three times after “The Lord is God”, and once at the end of Matins, immediately after the Great Doxology; once at the Liturgy, after the Little Entrance and the Introit; at Great Compline and at all the Hours.
by Dimitri Conomos