rímspillir

m. ‘calendar spoiler,’ ‘calendar confounder;’ a name given to the winters of those years in which the Elevatio Crucis (14th Sept.) falls on Sunday, if in the same summer an intercalary week is added (sumar-auki, q. v.), in which case the calendar of the winter becomes irregular, defined in Rb. 44 (ch. 27), see also Rb. (1812) 58.