Sources :
http://www.saintlucas.gr
http://webexhibits.org/calendars/calendar-christian-easter.html
http://www.esoterica.gr
http://www.assa.org.au/edm.html
http://www.eortologio.gr
http://users.chariot.net.au/~gmarts/easter.htm
http://el.wikipedia.org
http://www.oremus.org/liturgy/etc/ktf/app/easter.html
http://www.asxetos.gr
http://www.hourworld.com/easter.htm
http://personal.ecu.edu/mccartyr/orthodox-reform.html
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