As was pointed out, there are no google hits for this word, nor was there a quote illustrating it. However, as of this morning the word was added to wiktionary (I love the internet) with by the following quotation:
1856 William Robertson - The History of the Discovery and Settlement of America
The order of days in every month was computed, according to him, first by what he calls a tridecennary progression of days from one to thirteen, . . .
See <http://en.wiktionary.org/wiki/tridecennary>.
That's what I call a quick study...