calendal--prophetes.ai

calendal

calendal, a.
  (kəˈlɛndəl)
  [f. L. calend-æ calends + -al¹.]
  Of or pertaining to the Calends.

1839 Fraser's Mag. XX. 204 In the most ancient calendal system. Ibid. 328 Each of the thirty calendal forms had its one or more animal representatives.

Oxford English Dictionary