Name days on July 31
Saints and feasts of July 31

Eudokimos the Righteous
Venerable, Ευδόκιμος
St. Eudokimos the Righteous was born in Cappadocia in the ninth century to devout parents. Serving as an officer in the imperial service, he lived in the midst of the world a life of hidden holiness, guarding purity, giving alms generously to the poor and to widows and orphans, and avoiding all display, with a special reverence for the Theotokos.
Joseph of Arimathea
Saint, Ιωσήφ ο από Αριμαθαίας
Righteous Joseph of Arimathea was a member of the Sanhedrin and a secret disciple of Christ who boldly asked Pilate for the Lord's body, wrapped it in linen and laid it in his own new tomb. He is commemorated in the hymns of Holy Saturday and the Myrrhbearers.
Twelve Martyrs of Rome
Martyr, Δώδεκα Μάρτυρες Ρωμαίοι
The Twelve Martyrs of Rome are commemorated together as Christians who confessed Christ in the imperial city during the persecutions. Tradition relates that they were beheaded.
Anonymous New Martyr of Crete
Martyr, Ανώνυμος Κρης Νεομάρτυς
This New Martyr was a young Cretan whose name has not been preserved. Tradition relates that, having been forced into apostasy, he repented and confessed Christ before the authorities in Alexandria of Egypt.