The Fifty Year Almanac of Astronomical Events: 2021 to 2070 is a catalog listing a wide range of solar system phenomena as seen from Earth. Each year gives a concise compendium of the most conspicuous and/or significant astronomical events involving the Sun, Moon and the planets.

The astronomical events include the following.
- solar and lunar eclipses
- phases of the Moon
- apogees and perigees of the Moon
- Equinoxes and Solstices of Earth
- aphelion and perihelion (Earth, Mars, Jupiter, Saturn and Uranus)
- oppositions and conjunctions of the planets
- elongations of Mercury and Venus
- close conjunctions of the Moon with the planets and bright stars
- close conjunctions of planets with bright stars and other planets
- peak of major meteor showers

The date and time of each event is given in Greenwich Mean Time (= Coordinated Universal Time). With 200+ events each year, the Fifty Year Almanac includes over 10,200 astronomical events.