The bissextile is known to have been used by the Mayas, Tzendals, and Quiches, and it was probably common.
"Ancient America, in Notes on American Archaeology" by John D. Baldwin
This rule of the bissextile year, Rome, which is destined to endure to the end of time, established with the aid of the heavenly Deity.
"The Roman History of Ammianus Marcellinus" by Ammianus Marcellinus
Being the Third after Bissextile, or Leap-Year.
"A Catalogue of Books in English Later than 1700 (Vol 1 of 3)" by Various