It is celebrated 11.10.2026 according to the Julian calendar, or 24.10.2026 according to the Gregorian calendar. See what else we celebrate on that day here.
Sts. Nectarius (397), Arcadius (405), and Sinisius (427), patriarchs of Constantinople
St. Nectarius was patriarch from 381 to 397. St. Arsacius was patriarch after St. John Chrysostom from 404 to 405. St. Sisinius was patriarch from 426 to 427.