Bibliothèque nationale de France Nouvelle acquisition latine 3210, known as the Hours of Jean de Chateauneuf, is a Book from northern France made around the end of the 15th Century.  It has a series of lovely miniatures, painted by Georges Trubert, tending towards shades of blue.  The calendar is complete, unusual for a Use of Rome book, and again gives blue primacy, it is the color of the most important saints.  The one flaw is that the blue ink is not as stable as the brown and red used for the rest of the entries and has faded to illegibility on some of the pages, see the first name on September (f.5r) below.  There are also an unusually large number, 53, of unidentified saints.  Further work is needed

The first of three Books of Hours added during a visit to the BPL manuscript collection last week, MS q. med 137 is a beautiful small Book illumiated in the Workshop of Willian Vrelant, with text in a semi-batarde script.  It's a somewhat unusual book liturgically, Use of Rome, but with calendar for Utrecht and text entirely in Latin.  Most of the Utrecht books are the Dutch transtlation of Geert Groote.  The Calendar itself has no very unusual details, there are only 160 entries and nearly all seem to match Bruges exemplars.  The image below(f.28r) is after the calendar, the start of the Mass of the Blessed Virgin Mary, showing the gray and blue foliage that is common throughout the book

The Hours of Marguerite d'Orléans, Bibliothèque nationale de France MS Latin 1168b, is a lavishly illuminated Use of Rome book.  The calendar has some unusual features including a pattern of red-red-blue-blue, in additional to the more common red-blue.  The second page for March, f.3v, is a good example

Thanks to the assistance of an indulgent librarian, I was able to finish the gorgeous, though fragmentary Houghton MS Typ 213, a Italian book from 1485-1494 written and illuminated by Bartolomeo Sanvito.  The prayers are Use of Rome, but the calendar is localized to Padua.  It's use of brown and gold ink made transcribing from photographs challenging, The first 1/2 of February, f.2r, is below

British Library Yates Thompson 29, known asthe 'Hours of Bonaparte Ghislieri', formerly known as 'The Albani Hours', is a lovely Humanistic Use of Rome book, from Bologna, about 1500.  The calendar is decorated with the expected foliage and cameos, and the bottom of the first page of each month has an "important" saint, though not always one realated to the month.  There's an interesting error in the months of May and June, may is incorrectly written with 30 days, ending with a dominical letter of 'c' (see f.5v below), which would have been right for May 30th.  Either as an intentional correction or, more likely, as an error from the same cause, June has 31 days, and starts with dominical letter 'd'.  The saint on the second line of June, however, is a correct saint for June 1, and the rest of the month continues in the same manner.  There is no evidence for this practice, but if one were copying from a non-paginated calendar, this mistake would be easily possible

Latin 9474 from the Bibliothèque nationale de France is a spectacular late use of Rome book, known as the Grand Heures d'Anne de Bretagne.  The entire program of illumination was done by Jean Bourdichon, student of Jehan Fouquet. Every month starts with the calendar overlaid over a scene of the labor, with the Zodiac sign in the sky as part of the scene.  The verso has a border on the outer edge with realistic depictions of named flowers and insects.  December is below (f.15r-v), with the slaughter of pigs under Capricorn.

Another manuscript from the Richardson collection at Harvard's Houghton Library, Richardson 9 is a northern book, Use of Rome,  from circa 1500, written in a very practiced Batarde hand.  There are remarkably few errors in the completely-populated calendar and although it is not listed as such in the catalogues, the signs point to Bruges as the source of the calendar.  The start of October (f.12v below) shows an interesting listing on the 3rd, Sts. Ewald and Ewald, 2 priests who died on the same day, are listed as "Duorum Enwaldorum", "The Two Enwalds"

Harvard's Houghton Library MS Lat 251 is a turn-of-the 15th century Parisian book.  Though the text is Use of Rome, the calendar is thoroughly Parisian.  The text is fragmentary, with both text and illuminations missing, but the calendar is complete, with 260 entries.  F.1r, below, is a good representitive of the decoration scheme, with banded foliage on the outer edge in muted colors.  Also note the unusual missing entries for January 2-4, where the Octaves of Stephen, John and the Innocents would usually be.