Orthodox calendar 2015

Notes

1. How Easter is calculated
2. Orthodox feasts: immovable and movable
3. Days of the remembrance of the departed
4. Orthodox fast

1. Easter is calculated using Gauss formula. a = [(19 * [Y / 19] + 15) / 30], where Y - year, [] - residue of division;
   b = [(2 * [Y / 4] + 4 * [Y / 7] + 6 * a + 6) / 7];
   If (a + b) > 10 then Easter is (a + b - 9) of April (old calendar) else (22 + a + b) of March (old calendar). Thus the date of Easter can be from 22.03 to 25.04 (old calendar) or from 04.04 to 08.05 (new calendar).
   
   
2. Feasts are set off with red color.
   Immovable feasts:
   07.01 - Nativity of Christ (12 great feasts)
   14.01 - Circumcision of Christ (great feast)
   19.01 - Theophany. Baptism of Christ (12 great feasts)
   15.02 - Presentation of Christ (12 great feasts)
   07.04 - Annunciation (12 great feasts)
   21.05 - John the Theologian
   22.05 - St. Nicolas the Miracle-Worker
   07.07 - Nativity of St. John the Forerunner (great feast)
   12.07 - Apostles Peter and Paul (great feast)
   19.08 - Transfiguration of Jesus Christ (12 great feasts)
   28.08 - Dormition of the Theotokos (12 great feasts)
   11.09 - Beheading of St. John the Forerunner (great feast)
   21.09 - Nativity of the Theotokos (12 great feasts)
   27.09 - Elevation of the Holy Cross (12 great feasts)
   09.10 - John the Theologian
   14.10 - Protection of the Theotokos (great feast)
   04.12 - Presentation of the Theotokos (12 great feasts)
   19.12 - St. Nicolas the Miracle-Worker
   
   
   Movable feasts:
   08.02.2015 - Synaxis of new Russian martyrs
   25.01.2015 - Sunday of Zaccheus
   01.02.2015 - Sunday of the Publican and Pharisee
   08.02.2015 - Sunday of the Prodigal Son
   15.02.2015 - Sunday of the Last Judgment
   22.02.2015 - Sunday of Forgiveness. Expulsion of Adam and Eve from Paradise
   01.03.2015 - Sunday of Orthodoxy
   08.03.2015 - Sunday of St. Gregory Palamas
   15.03.2015 - Sunday of the Holy Cross
   22.03.2015 - Sunday of St. John Climacus
   29.03.2015 - Sunday of St. Mary of Egypt
   04.04.2015 - Lazarus Saturday
   05.04.2015 - Palm Sunday (12 great feasts)
   06.04.2015 - Holy Monday
   07.04.2015 - Holy Tuesday
   08.04.2015 - Holy Wednesday
   09.04.2015 - Holy Thursday. Last Supper
   10.04.2015 - Holy Friday. Crucifixion of Christ
   11.04.2015 - Holy Saturday. Christ's descent into Hades
   12.04.2015 - Resurrection of the Lord. Pascha
   19.04.2015 - Sunday of St. Thomas. Antipascha
   26.04.2015 - Sunday of Myrrh-bearing Women
   03.05.2015 - Sunday of the Paralytic
   10.05.2015 - Sunday of the Samaritan Woman
   17.05.2015 - Sunday of the Blind Man
   21.05.2015 - Ascension of Christ (12 great feasts)
   24.05.2015 - Sunday of the Fathers of the First Ecumenical Council
   31.05.2015 - Pentecost (12 great feasts)
   01.06.2015 - Day of the Holy Spirit
   07.06.2015 - Sunday of all Saints
   14.06.2015 - Sunday of all Russian Saints
   
   
3. Days of the remembrance of the departed are set off in back color.
   14.02.2015 - Paternal Saturday
   07.03.2015 - Paternal Saturday
   14.03.2015 - Paternal Saturday
   21.03.2015 - Paternal Saturday
   21.04.2015 - Day of Rejoicing
   30.05.2015 - Paternal Saturday
   09.05 - Remembrance of the departed soldiers
   07.11.2015 - Demetrius (Parental) Saturday
   
   
4. Fast days are set off in background colors.
   23.02.2015 - 11.04.2015 - the Great Lent
   08.06.2015 - 11.07.2015 - the Apostles' Fast
   14.08 - 27.08 - the Dormition Fast
   28.12 - 06.01 - the Nativity Fast
   
   

   Meat is excluded

   Fast

   Strict fast