Tzolkin – 20 periods

The Tzolkin consisted of 20 periods each with 13 days for a 260-day count. Day names - 01: Imix, 02: Ik’, 03: Akʼbʼal, 04: K’an, 05: Chikchan…. The word tzolkʼin means "division of days”.

“Each day had a number and a name, the numbers from 1 to 13 and 20 day names. When the 13 numbers were gone through, they began again, and the 20 day names continued. When the day names were gone through, they repeated, and the numbers continued up to 13. The cycles of 13 and 20 repeated until they came back to the first number, first name again in 260 days. The priests who kept the calendars used the Tzolkin to determine days for sowing and harvest, military triumphs, religious ceremonies and divination.” (

Maya calendars

Maya calendars

Maya calendars - A system of calendars consisting of several cycles (counts) of different lengths with the Tzolkin, a 260-day count and the Haabʼ, a 365-day count. Both form a synchronized cycle lasting for 52 Haabʼ: the Calendar Round. Used by pre-Columbian Mesoamerica and by modern groups in the Guatemalan highlands.

Calendriers mayas - Un système de calendriers consistant en plusieurs cycles (comptes) de différentes longueurs avec le Tzolkin, un compte de 260 jours et le Haabʼ, un compte de 365 jours. Les deux forment un cycle synchronisé d'une durée de 52 Haab'. Utilisé en Méso-Amérique précolombienne ainsi que par des groupes contemporains figurant sur les hauts plateaux guatémaltèques.



Maya calendars consist of a system of different lengths with the Tzolkin, a 260-day count, and the Haabʼ, a 365-day count. (Mayan lgs, Maya wr)

Les calendriers mayas consistent en plusieurs systèmes de différentes longueurs avec le Tzolkin, un décompte de 260 jours, et le Haabʼ, un décompte de 365 jours.

What is a date? How to define it? How is it set? According to which systems? According to Roman to Gregorian, Iranian, Chinese, Muslim or Hebrew principles, which calendars have been created? How did they last or, on the contrary, were they interrupted? What changes does digital technology institute in the management of calendars?. (to be completed)

Qu’est-ce qu’une date ? Comment la définir ? Comment la fixe-t-on ? Selon quels systèmes? Selon les principes romain au grégorien, iranien, chinois, musulman ou hébreu, quels calendriers a–t–on créés ? Comment ont-ils duré ou au contraire se sont-ils interrompus ? Quels changements le numérique institue–t–il dans la gestion du calendrier ?... (à compléter)

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