"As an aid to the memory, they frequently made use of notches cut in a stick or some similar device for the computation of nights (for days were counted by nights) or even of months and years. Pictographically a day or daytime was represented by a six or eight pointed star, thus, *, as a symbol of the sun. A simple cross, thus X (a star), was a symbol of a night; and a crescent, thus ☾, represented a moon or lunar month" (Dunbar, 1).
Dakota, and Cheyenne.—"The Dakota count their years by winters (which is quite natural, as that season in their high levels and latitudes practically lasts more than six months), and say a man is so many snows old, or that so many snow seasons have passed since an occurrence. They have no division of time into weeks, and their months are absolutely lunar, only twelve, however, being designated, which receive their names upon the recurrence of some prominent physical phenomenon. For example, the period partly embraced by February is called the 'raccoon moon'; March, 'the sore eye moon;' and April, that in which the geese lay eggs. As the appearance of raccoons after hibernation, the causes inducing inflamed eyes, and oviposition by geese vary with the meteorological character of each year, and as the twelve lunations reckoned do not bring them back to the point in the season where counting commenced, there is often dispute in the Dakota tipis toward the end of winter as to the correct current date" (Mallery, 4).
"Some tribes have twelve named moons in the year, but many tribes have not more than six; and different bands of the same tribe, if occupying widely separated sections of the country, will have different names for the same moon. Knowing well the habits of animals, and having roamed over vast areas, they readily recognize any special moon that may be mentioned, even though their name for it may be different. One of the nomenclatures used by the Teton-Sioux and Cheyenne beginning with the moon just before winter is as follows:
1. The moon the leaves fall off.
2. The moon the buffalo cow's fœtus is getting large.
3. The moon the wolves run together.
4. The moon the skin of the fœtus of buffalo commences to color.
5. The moon the hair gets thick on buffalo fœtus; called also "men's mouth" or "hard mouth."
6. The sore-eyed moon; buffalo cows drop their calves.
7. The moon the ducks come.