Saint Niphon, Bishop of Novgorod, monk of the Kiev Caves.
Niphon was a monk of the Kiev Caves Monastery, chosen Bishop of Novgorod in the twelfth century. He was a strict ascetic and a builder of churches, and defended the canonical order of the Church in a time of political strife.
He reposed at the Kiev Caves and was buried there.
Feast day
On the New Calendar, Niphon of Novgorod is commemorated on April 8. Churches on the Old (Julian) Calendar keep the feast on April 21 of the civil calendar.
Also commemorated on April 8

Agabus, Rufus, Phlegon and Asyncritus
Apostle, Άγαβος, Ρούφος, Φλέγων και Ασύγκριτος
Holy Apostles Agabus, Rufus, Phlegon and Asyncritus of the Seventy.
Celestine of Rome
Hierarch, Κελεστίνος Πάπας Ρώμης
Saint Celestine, Pope of Rome, champion of Orthodoxy against Nestorius.
Pausilypos of Heraclea
Martyr, Παυσίλυπος
Holy Martyr Pausilypos, who suffered at Heraclea in Thrace under Hadrian.
John the Ship-Captain
Martyr, Ιωάννης ο Ναύκληρος
Holy New Martyr John the Ship-Captain of Kos, burned for Christ.