"year-time chronicle") is a list of Japanese kigo (seasonal terms) used in haiku and related forms of poetry.
An entry in a saijiki usually includes a description of the kigo itself, as well as a list of similar or related words, and some examples of haiku that include that kigo.
Modern saijiki and kiyose are divided into the four seasons and New Year, with some containing a further section for seasonless (無季, muki) topics.
Each seasonal section is further divided into a standard set of categories, each containing a list of relevant kigo.
The most common categories are the season, the heavens, the earth, humanity, observances, animals and plants.