Planetary hours divide the day into unequal segments ruled by the seven classical planets. Used since Hellenistic times for timing — business decisions, communications, medical procedures, magical operations — planetary hours remain one of the most practical tools in traditional astrology.
View Planetary Hours Now → See plansPlanetary hours do not correspond to our standard clock hours. Instead, the period from sunrise to sunset is divided into 12 equal parts (day hours) and sunset to sunrise into another 12 equal parts (night hours). The ruling planet for the first hour of each day is determined by the day of the week (hence the days' names: Sunday = Sun, Monday = Moon, Tuesday = Mars/Tiw, Wednesday = Mercury/Woden, Thursday = Jupiter/Thor, Friday = Venus/Frigg, Saturday = Saturn). Subsequent hours follow the Chaldean order: Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon.
The tool is free. Unlock classical AI interpretation with Day Pass or PRO.
A practical guide for beginners to align your daily activities with the planetary rulership of each hour.
Read article →How to use the hours of Sun, Jupiter, and Mercury to sign contracts, negotiate, and launch new projects.
Read article →