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Published online by Cambridge University Press: 05 December 2008
Medieval Iceland had two different systems of reckoning time which were used concurrently for different purposes: it had adopted the Julian calendar, prevalent in all of Europe, and it had also developed a separate calendar with no close parallels in any other country. This distinctly Icelandic calendar can be traced back to pre-Christian times, and it remained popular throughout the Middle Ages up until early modern days. This article uses brief excerpts from a computer program to analyze the structure and main features of the Icelandic calendar and to demonstrate by which methods its divisions into years, months and weeks were reconciled with the natural solar year as well as with the interlocking cycles of “fixed” and “movable” ecclesiastical holidays of the Julian calendar.