Orthodox calendar 2023

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:
   05.02.2023 - Synaxis of new Russian martyrs
   29.01.2023 - Sunday of Zaccheus
   05.02.2023 - Sunday of the Publican and Pharisee
   12.02.2023 - Sunday of the Prodigal Son
   19.02.2023 - Sunday of the Last Judgment
   26.02.2023 - Sunday of Forgiveness. Expulsion of Adam and Eve from Paradise
   05.03.2023 - Sunday of Orthodoxy
   12.03.2023 - Sunday of St. Gregory Palamas
   19.03.2023 - Sunday of the Holy Cross
   26.03.2023 - Sunday of St. John Climacus
   02.04.2023 - Sunday of St. Mary of Egypt
   08.04.2023 - Lazarus Saturday
   09.04.2023 - Palm Sunday (12 great feasts)
   10.04.2023 - Holy Monday
   11.04.2023 - Holy Tuesday
   12.04.2023 - Holy Wednesday
   13.04.2023 - Holy Thursday. Last Supper
   14.04.2023 - Holy Friday. Crucifixion of Christ
   15.04.2023 - Holy Saturday. Christ's descent into Hades
   16.04.2023 - Resurrection of the Lord. Pascha
   23.04.2023 - Sunday of St. Thomas. Antipascha
   30.04.2023 - Sunday of Myrrh-bearing Women
   07.05.2023 - Sunday of the Paralytic
   14.05.2023 - Sunday of the Samaritan Woman
   21.05.2023 - Sunday of the Blind Man
   25.05.2023 - Ascension of Christ (12 great feasts)
   28.05.2023 - Sunday of the Fathers of the First Ecumenical Council
   04.06.2023 - Pentecost (12 great feasts)
   05.06.2023 - Day of the Holy Spirit
   11.06.2023 - Sunday of all Saints
   18.06.2023 - Sunday of all Russian Saints
   
   
3. Days of the remembrance of the departed are set off in back color.
   18.02.2023 - Paternal Saturday
   11.03.2023 - Paternal Saturday
   18.03.2023 - Paternal Saturday
   25.03.2023 - Paternal Saturday
   25.04.2023 - Day of Rejoicing
   03.06.2023 - Paternal Saturday
   09.05 - Remembrance of the departed soldiers
   04.11.2023 - Demetrius (Parental) Saturday
   
   
4. Fast days are set off in background colors.
   27.02.2023 - 15.04.2023 - the Great Lent
   12.06.2023 - 11.07.2023 - the Apostles' Fast
   14.08 - 27.08 - the Dormition Fast
   28.12 - 06.01 - the Nativity Fast
   
   

   Meat is excluded

   Fast

   Strict fast