Definition of "calendrical"

At that point, humanity crosses another threshold, miniaturizes its universe into symbolic form, and takes a toddling step toward iconography, writing, and the first stammerings of calendrical notation and mathematics.

1981, William Irwin Thompson, The Time Falling Bodies Take to Light: Mythology, Sexuality and the Origins of Culture, London: Rider/Hutchinson & Co., page 95

Although other ancient Mesoamerican societies, even in the Preclassic period, also possessed calendars, only the Maya calendar can be translated directly into today's calendrical system.

2009, Fred S. Kleine, Gardner's Art Through the Ages: A Global History‎, Thomson Wadsworth, page 371

This growing focus on calendrical matters in early modern Europe paralleled, and in some measure directly influenced, a renewed interest among Jews in their own calendar.

2011, Elisheva Carlebach, Palaces of Time: Jewish Calendar and Culture in Early Modern Europe, Belknap Press, page 47

In Vietnam, the calendrical system of "heavenly stems and earthly branches" sounds quite mystical and foreign, but this lunar calendar can in fact be translated quite simply into a Western calendar year with a formula and a chart.

2011, Erik Harms, Saigon's Edge: On the Margins of Ho Chi Minh City, University of Minnesota Press, page 101