An almanac is a yearly publication that provides a variety of information, including calendars, weather forecasts, and astronomical data. Traditionally, almanacs also include facts about agriculture, tides, and notable events. They serve as a handy reference for farmers, sailors, and anyone interested in seasonal changes. One of the most famous almanacs is the Old Farmer's Almanac, which has been published since 1792. It combines practical information with folklore and advice, making it popular among readers. Almanacs can be found in print and online, catering to diverse interests and needs.