[Medieval manuscripts]. Calendar leaf

from a Book of Hours, Northern Netherlands (Haarlem), ±1470, Middledutch text in black ink on vellum, rubricated, recto and verso, 12,7x9,6 cm. (leaf), 7,5x6 cm. (text), 17 lines to each page, one 2-line initial in blue ink, w. penwork flourishes extending into left margin on recto (so-called Holland style, most probably Haarlem).