Thank you Rose! I remember when you were doing your research. Aiden, in addition to saints on the calendar within the Eastern Christian Church (EO) there is also special Feast Days that we commemorate. These largely revolve around Christ's life and that of His Mother... since she is central to the Incarnation in our tradition.
There is so much written on these, that I think if I name them off and then you do a google search and add "Orthodox" you'll find some good info. that you can share. So here are the dates... starting from the beginning of our Liturgical Calendar (Liturgical New Year begins Sept 1st in the EO church)
Twelve Great Feasts of the Orthodox Church:
September 8, the Nativity of the Theotokos
September 14, the Exaltation of the Cross
November 21, the Presentation of the Theotokos
December 25, the Nativity of Christ/Christmas
January 6, the Baptism of Christ — Theophany, also called Epiphany
February 2, the Presentation of Jesus at the Temple
March 25, the Annunciation
The Sunday before Pascha (Easter) — the Entry into Jerusalem or Flowery/Willow/Palm Sunday
Forty Days after Pascha (Easter) — the Ascension of Christ Fifty Days after Pascha (Easter) — Pentecost
August 6, the Transfiguration
August 15, the Dormition (Falling Asleep) of the Theotokos
I just lifted them from a site here and it looks like the links came with it. Hopefully it worked, if not just go here to read about them: http://en.wikipedia.org/wiki/Great_Feasts_of_the_Orthodox_Church
Of course, the Feast of Feasts, Pascha (Easter), is not listed because it stand above and beyond all other feasts.
Good luck.. .sounds like a lovely idea.