January 20 (Eastern Orthodox liturgics)

Jan. 19 - Eastern Orthodox liturgical calendar - Jan. 21.

All fixed commemorations below are observed on February 2 by Orthodox Churches on the Old Calendar.

For January 20th, Orthodox Churches on the Old Calendar commemorate the Saints listed on January 7.

Martyrs Inna, Pinna, and Rimma
(Menologion of Basil II)

Venerable Euthymius the Great.

Martyrs Bassus, Eusebius, Eutychius, and Basilides
(Menologion of Basil II)

Imperial portrait of St Leo the Great.

Saint Fabian, Pope of Rome.

Martyrdom of St Sebastian.

Saint Agatho, Pope of Rome
(Menologion of Basil II)

Venerable Theodore Kuzmich of Tomsk.

Greek Sources

Russian Sources

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Wikipedia