noun
- A chart or mechanical device that indicates the days of the week corresponding to any given date over a long period of years. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). perpetual calendar. Retrieved September 23, 2026, from http://smartdefine.org/perpetual_calendar/definitions/1223277 |
| Chicago | WordNet. 2010. "perpetual calendar" http://smartdefine.org/perpetual_calendar/definitions/1223277 (accessed September 23, 2026). |
| Harvard | WordNet 2010, perpetual calendar, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/perpetual_calendar/definitions/1223277>. |
| MLA | WordNet. "perpetual calendar" 23 October 2010. Web. 23 September 2026. <http://smartdefine.org/perpetual_calendar/definitions/1223277> |