Nychthemeron, or Nycthemeron ( from Greek nykt- "night", (h)emera "day" ) is a period of 24 consecutive hours. It is sometimes used, especially in technical literature, to avoid the ambiguity inherent in the term "day." Water, Rabbit, and Deer: three of the 20 day symbols in the Aztec calendar, from the Aztec Sun Stone. ...

It is the period of time that a calendar normally labels with a date. A page from the Hindu calendar 1871-72. ... Note that this article includes some hyperlinked dates whose format is configurable in Special pages | Preferences. What you see may not be what the author intended. ...