The xiuhpohualli was made up of 18 “months” of 20 days, and with a remainder of 5 “void” days at the end of a cycle before the new xiuhpohualli cycle began.
Sementara itu, xiuhpohualli terdiri dari 18 "bulan", dan masing-masing "bulan" terdiri dari 20 hari, ditambah dengan 5 hari "kosong" di akhir siklus sebelum siklus xiuhpohualli yang baru dimulai.