Jewish computus manuscripts in the early modern period were illustrated with a rich, original and unique iconographic program. These images have not previously been understood nor systematically interpreted. This article introduces the genre and provides a survey of its illustrations. It argues that the images complemented the messages in the text, particularly those concerning the antiquity and sanctity of the calendar and the valorization of the Jewish calendar above others. Jewish computus manuscripts in the early modern period were illustrated with a rich, original and unique iconographic program. These images have not previously been understood nor systematically interpreted. This article introduces the genre and provides a survey of its illustrations. It argues that the images complemented the messages in the text, particularly those concerning the antiquity and sanctity of the calendar and the valorization of the Jewish calendar above others.