A precursor to a almanac was a Greek weather-calendar, the parapegma. Ptolemy the Alexandrian astronomer (1st century CE) wrote a treatise, Phaseis—"phases of fixed stars and collection of weather-changes" is a translation of its fully title—the core of which occurs as parapegma, a listing of dates of seasonally regular upwind changes, 1st appearances & survive appearances of stars or even even constellations at sunrise or sunset, & solar cases like solstices, totally organized based on data from the solar season. By having a astronomic computations were potential weather phenomena, composed as a weaken of observations mass produced by various authorities of the past. Parapegmata experienced been composed for centuries.

Ptolemy believed that a astronomic phenomena caused a changes around seasonal atmospheric condition; his explanation of how come there was non an precise correlation one cases was that the physical influences of more heavenly bodies too inherit play. Hence for him, upwind prediction was the favorite section of astrology [http://www.chass.utoronto.ca/~ajones/ptolgeog/astroworks.html].

After almanacs were foremost devised, population however saw little difference between predicting a movements of a stars & tides, & predicting the new in the divination sense. Early almanacs so contained general horoscopes, when well as a additional concrete tools. Of these almanac, ''Poor Robin's Almanack'' (not to be confused with Benjamin Franklin's ''Poor Richard's Almanac) parodied these horoscopes in its 1664 issue, saying "This month we may expect to hear of the Death of some Man, Woman, or Child, either in Kent or Christendom." This sort of almanac still exists as Old Moore's Almanac, although their more mainstream modern descendants are the Your Year in the Stars supplements in the New Year edition of some newspapers and magazines.

Contemporary Almanacs
Presently promulgated almanacs like A Just released York Days Almanac'' develop expanded their scope & contents beyond that of their historical counterparts. In todays world's almanacs include a comprehensive presentation of statististical & descriptive information covering the entire globe. Contents as well include discussions of topical developments & the sum-up of recent historical cases.

Major topics covered by almanacs (reflected by their tables of contents) include: geography, government, demographics, agriculture, economics and business, health and medicine, religion, mass media, transportation, science and technology, sport, and awards/prizes.

Specialised almanacs besides come existence published, like A Almanac of Our contries Politics published per National Journal.