Alexander Schmemann has written:

'Great Lent'

'For the life of the world' -- subject(s): Orthodox Eastern Church

'World as Sacrament'

'Introduction to liturgical theology' -- subject(s): Doctrines, Liturgics, Liturgy, Orthodox Eastern Church

April 13th

April 12 by the Western calendar; April 19 by the Eastern Orthodox calendar.

Orthodox Pascha is April 19, 2009, one week after Western Easter.

Lent for Western Christians (Catholics, Protestants) ends on 22 March, since 23 March 2008 is the Western date for Easter. Lent for Eastern Orthodox Christians starts on 10 March and ends on 26 April, since 27 April 2008 is the Orthodox date for Pascha/Easter.