Directorios

Enlace: http://webexhibits.org/calendars/

Descripción: Institute for Dynamic Educational Advancement (IDEA).
«Explore the fascinating history of the human endeavor to organize our lives in accordance with the sun and stars.»
«Calendars are normally based on astronomical events, and the two most important astronomical objects are the sun and the moon. Their cycles are very important in the construction and understanding of calendars.»