He preached the Faith in the countries of Agen, Anjou, and Beauvais, and being arrived at Amiens, there chose his residence, and founded there a numerous church of faithful disciples. He received the crown of martyrdom in that city, whether under the prefect Rictius Varus, or in some other persecution from Decius, in 250, to Diocletian, in 303, is uncertain.
Feast Day of Saint Firmin
The Feast Day of Saint Firmin is September 25. The origin of Feast Days: most saints have specially designated feast days and are associated with a specific day of the year and these are referred to as the saint's feast day. The feast days first arose from the very early Christian custom of the annual commemoration of martyrs on the dates of their deaths at the same time celebrating their birth into heaven.