The most important feast days are called Holy Days of Obligation.
For a complete list of the feast days of saints click here.
12 days
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Medieval people did not usually have what we would call parades. They had processions, in which people sang and played religious music or said prayers, and these were usually on feast days for the Church, days of local patron saints, or Sundays.
The Pilgrims feast lasted for three days.
The number of feast days in a calendar year depends on the religious tradition or cultural practices being followed. For example, in Catholicism, there are many feast days, including those dedicated to saints, liturgical celebrations, and holy days of obligation. In other religious traditions or cultures, the number of feast days may vary.
A Solemnity is the highest liturgical rank of a feast in the ecclesiastical calendar, followed by Feast, Memorial, and Optional Memorial.
Pattern Days
9 days
Joseph has two feast days: March 19 and May 1.
No, it's a noun or verb depending on context. It is used as an adjunct (feast days).