According to ancient usage, St. Catherine (along with St. [[Mercurius the Great-martyr]]) was celebrated on [[November 24]], whereas the holy [[Hieromartyr]]s [[Clement of Rome]] and [[Peter of Alexandria]] were celebrated on the [[November 25|25th]]. The dates of the feasts of these saints were interchanged at the requests of the [[St. Catherine's Monastery (Sinai)|Church and Monastery of Sinai]], so that the festival of Catherine, their [[patron saint|patron]], might be celebrated more festively together with the [[leavetaking]] of the [[Presentation of the Theotokos]]. The Slavic churches, however, continue to commemorate these saints on their original dates.<{{ref>''The Great Horologion''. Holy Transfiguration Monastery, p. 322</ref>|1}}