Note 2 — THE TONALAMATL AND THE SOLAR CALENDAR
Reading edition
and so on. It will be seen from this list that the fourteenth day-sign takes the number 1 again. Each of the day-signs under this arrangement has a number that does not recur in connection with that sign for a space of 260 days, as is proved by the circumstance that the numbers2 of the day-signs and figures (20 to 13), if multiplied together, give as a product 260, the exact number of days in the tonalamatl.