An almanac is a type of reference book that provides information about various subjects, typically organized by calendar year. It often includes details like weather predictions, astronomical data, phases of the moon, and other useful facts or statistics relevant to specific fields such as agriculture, maritime activities, or general knowledge.
The word "almanac" can be traced back to the Arabic word "al-manākh," which refers to a climate or weather guide. It entered Middle English through Latin in the late Middle Ages, reflecting the historical importance of such reference materials.