Real Dictionary

almanac
An almanac is a book published every year which contains information about events connected with a particular subject or activity, and facts and statistics about that activity.
An almanac is a book published every year which contains information about the movements of the planets, the changes of the moon and the tides, and the dates of important anniversaries.

almanac in American English
a yearly calendar of days, weeks, and months, with astronomical data, weather forecasts, etc.
noun: an annual publication containing a calendar for the coming year, the times of such events and phenomena as anniversaries, sunrises and sunsets, phases of the moon, tides, etc., and other statistical information and related topics

almanac in British English
noun: a yearly calendar giving statistical information on events and phenomena, such as the phases of the moon, times of sunrise and sunset, tides, anniversaries, etc