Sunday, February 24, 2008

Keeping a calendar by Trecenas.

DESIGN OF THE MEXICAN CALENDAR BY TRECENAS


The Mexican calendar designers choose to name twenty ritual days and then count Days in cycles of 13. This can be best demonstrated by making a table of 13 square spaces in each of twenty rows. I will now explain the system by placing day numbers in sequence into the squares, starting with day 1 in row 1 and continuing down the column to row 13. In row 14 the days repeat from 1 and continues counting days as each day number is placed in a new square until the column is filled with day 7 in row 20 then continues to column 2 with day 8, etc,etc. The final row is filled with day 13 and a new table of ritual days can be started in row 1 with day 1. The table of 20 rows and 13 columns has been filled with 260 days. I do not know the prehistoric Mexican reason for this choice of counting days. My guess is that they had a twenty day ceremonial week and decided to extend the calendar by counting ceremonial weeks to correspond to the number of Cosmic Moon Cycles. The result was a 260 day ritual calendar which does not correspond with
the agricultural seasons and with more advanced observations of a Cosmic Year Cycle.

1 Cipactli, caiman1
8
2
9
3
10
4
11
5
12
6
13
7
2 Ehecatl, wind2
9
3
10
4
11
5
12
6
13
7
1
8
3 Calli, house3
10
4
11
5
12
6
13
7
1
8
2
9
4 Cuetzpallin, Lizard4
11
5
12
6
13
7
1
8
2
9
3
10
5 Coatl, snake5
12
6
13
7
1
8
2
9
3
10
4
11
6 Miquiztli. death6
13
7
1
8
2
9
3
10
4
11
5
12
7 Mazatl, deer7
1
8
2
9
3
10
4
11
5
12
6
13
8 Tochtli, rabbit8
2
9
3
10
4
11
5
12
6
13
7
1
9 Atl, water9
3
10
4
11
5
1
6
13
7
1
8
2
10 Itzcuintli, dog10
4
11
5
12
6
13
7
1
8
2
9
3
11 Ozomatli, monkey11
5
12
6
13
7
1
8
2
9
3
10
4
12 Malinalli, grass12
6
13
7
1
8
2
9
3
10
4
11
5
13 Acatl, reed13
7
1
8
2
9
3
10
4
11
5
12
6
1 Ocelotl, jaguar1
8
2
9
3
10
4
11
5
12
6
13
7
2 Cuautli, eagle2
9
3
10
4
11
5
12
6
13
7
1
8
3 Cozcacuahtli, king vulture3
10
4
11
5
12
6
13
7
1
8
2
9
4 Ollin, movement4
11
5
12
6
13
7
1
8
2
9
3
10
5 Tecpatl, flint5
12
6
13
7
1
8
2
9
3
10
4
11
6 Quiahuitl, rain
6
13
7
1
8
2
9
3
10
4
11
5
12
7 Xochitl, flower7
1
8
2
9
3
10
4
11
5
12
6
13


It is interesting that the last square of this ritual calendar ends on day 13 corresponding to a full count of moons.

There is another viewpoint for the same calendar, organized in columns of 13 sequential number/day names
and rows of 20 trecenas. Each complete row ( a trecena) is then given the name of the first day of this row. The first row is 1 Cipactli, second row 1 Ocelotl, third row 1 Mazatl, etc to the 20th row which is 1 Tochtli. This table contains 260 named days. The name of each day is a combination of the number heading a column and a word from a trecena. This chart can be mounted on wall and each day can be marked as complete at sunset. At the end of 260 days another identical page can be used starting again with 1 Cipactli. My intuition tells me that some prehistoric timekeepers used exactly this technique for recording days. New pages may be added as long as a sequence of timekeepers keep the record.

This serves me s an example for further examination of calendar construction. There may have been competing timekeepers that used another type of page or even piles of stones, marks on boards, or marked rocks, etc.

THIS CHART IS TRUNCATED ON RIGHT MARGIN BY BLOGGER


I often want to know how the date on my kitchen calendar relates to the sacred calendar. This format of the sacred calendar is useful for observing the relationship because nahuatl day names always have a number followed by a name. I can look down any column headed by the number until finding the name to find the exact location in the 260 day sequence of the sacred calendar. This calendar format is published in my documents at:

http://docs.google.com/Doc?id=d7b4c3p_68f4jp6qz9
1
2
3
4
5
6
7
8
9
10
11
12
13
Cipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Miquiztli
Mazatl
Tochtli
Atl
Itzquintli
Ozomatli
Malinalli
Acatl
Ocelotl
Cuauhtli
Cozcacauhtli
Ollin
TecpatlQuiahuitlXochitlCipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Miquizlti
Mazatl
Tochtli
Atl
Itzqintli
Ozomatli
Malinalli
Acatl
Ocelotl
Cuauhtli
Cozcacauhtli
Ollin
Tecpatl
Quiahuitl
Xochitl
Cipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Miquiztli
Mazatl
Tochtli
Atl
Itzquintli
Ozomatli
Malinalli
Acatl
Ocelotl
Cuauhtli
CozcacauhtliOllin
Tecpatl
Quiahuitl
Xochitl
Cipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Mizquiztli
Mazatl
Tochtli
Atl
Itzquintli
Ozomatli
Malinalli
Acatl
Ocelotl
Cucahtli
CozcacauhtliOllin
Tecpatl
Quiahuitl
Xochitl
Cipactli
Ehecatl
Calli
Cuetpallin
Coatl
Mizquiztli
Mazatl
Tochtli
Atl
Itzqquintlitli
Ozomati
Malinalli
Acatl
Ocelotl
Cuauhtli
CozcacauhtliOllin
Tecpatl
Quiahuitl
Xochtli
Cipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Mizquiztli
Mazatl
Tochtli
Atl
Itzquintli
Ozomatli
Malinalli
Acatl
Ocelotl
Cuauhtli
Cozcauhtli
Ollin
Tecpatl
Quiahuitl
Xochtli
Cipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Mizquiztli
Mazatl
Tochtli
Atl
Itzquintli
Ozomatli
Malinalli
Acatl
Ocelotl
Cuauhtli
CozcacauhtliOllin
Tecpatl
Quiahuitl
Xochtli
Cipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Mizquiztli
Mazatl
Tochtli
Atl
Itzquintli
Ozomatli
Malinalli
Acatl
Ocelotl
Cuauhtli
Cozcacauhtli
Ollin
Tecpatl
Quiahuitl
Xochtli
Cipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Mizquiztli
Mazatl
Tochtli
Atl
Itzcuintli
Ozomati
Malinalli
Acatl
Ocelotl
Cuauhtli
Cozcacauhtli
Ollin
Tecpatl
Quiahuitl
Xochtli
Cipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Mizquiztli
Mazatl
Tochtli
Atl
Itzquintli
Ozomatli
Malinalli
Acatl
Ocelotl
Cuauhtli
Cozcacuauhtli
Ollin
Tecpatl
Quiahuitl
Xochtli
Cipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Mizquiztli
Mazatl
Tochtli
Atl
Itzquintli
Ozomati
Malinalli
Acatl
Ocelotl
Cuautli
CozcacauhtliOllin
Tecpatl
Quiahuitl
Xoctli
Cipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Mizquiztli
Mzatl
Tochtli
Atl
Itzquintli
Ozomati
Malinalli
Acatl
Ocelotl
Cuauhtli
CozcacauhtliOllin
Tecpatl
Quiahuitl
Xochtli
Cipactli
Ehecatl
Calli
Cuetzpallin
Coatl
Mizquiztli
Mazatl
Tochtli
Atl
Itzquintli
Ozomatli
Malinalli
Acatl
Ocelotl
Cuauhtli
Cozcacauhtli Ollin
Tecpatl
Quiahuitl
Xochtli

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About Me

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San Miguel de Allende, Guanajuato, Mexico, Mexico
I am a retired Physical Scientist returning to my early interests in Social Science. I now live in San Miguel de Allende, Guanajuato, Mexico; and another home in Rosarito Beach, Mexico; and other homes of friends in San Diego, Ca.