The feast day of Saint Amand is now February 6, previously Feb 1. He is the patron saint of brewers and vinters. Amanda is a feminine derivative of the saint's name.
Amad was a great missionary and a father of monasticism in ancient Belgium. Before he was ordained, he went to live in a small monastery, but his father threatened to disinherit him unless he came home. Amand cheerfully replied, "Christ is my only inheritance."
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July 26 is the feast of St. Anne.
Sometimes a feast day of a saint is on or near their death day. Since we do not know the date of death of Saint Jude, there may be no significance to the date.
April 29 is the feast day of Saint Catherine of Siena, a patron saint of Italy.
September 21
The feast day of a saint can be any random date or it may fall on the commemoration day of some event of the saint's life, such as their date of death, the day of their canonization or other such event.
April 16 is the feast of St. Bernadette.
A Saint's feast day falls on whatever day was chosen by the church. It could be a date that has significance to the Saint or a random day.
Joseph has two feast days: March 19 and May 1.
On September 29 we celebrate the feast of Saints Gabriel, Michael and Raphael the Archangels
December 13 is the feast of Saint Lucy of Syracuse.
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There is no saint named Jennifer. However, there is a Saint Genevieve whose feast day is on January 3.