From the Goethe University in Frankfurt comes a late 15th century Flemish book, Ms. germ. oct. 32, formerly catalogued as Ausst. 43.
The book is not entirely remarkable, but the calendar has an unusual pattern. There are several unidentified entries that could be about 7-9 days early, St. Patris (Patrick) listed on March 9 and celebrated on 17, St. Rufin (probably one of the 2 Sts. Rufina), listed on July 12 and July 19, and St. Juliene (Juliane), listed on June 7 and celebrated on June 16. Several other unidentified saints could suffer from the same transposition, though there is less evidence.
(DB Id: 220)
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