What is Hora?
Hora is the Indian system of planetary hours. The word is usually traced to the Greek hōra, which also gave English its word "hour". Varahamihira explained it as a short form of aho-ratra, “day and night”. Each day, from sunrise to the next sunrise, is divided into twenty-four horas. Each hora is ruled by one of the seven classical planets and takes on that planet’s nature. So choosing the hora that suits the task is a quick way to match it with a supportive influence.
How Hora is calculated
The first hora of the day belongs to the planet that rules the weekday: the Sun on Sunday, the Moon on Monday, and so on. The remaining horas follow the fixed Chaldean order of the planets: Sun, Venus, Mercury, Moon, Saturn, Jupiter, Mars, repeating through the day and night.
Day horas are measured across the daytime and night horas across the night. So a hora is not exactly sixty minutes. It stretches or shrinks with the season and your city’s sunrise and sunset.
Choosing a Hora for your activity
Match the task to the planet that governs it for the most supportive hour:
- Sun, authority, government dealings, leadership
- Moon, travel, water, emotional and domestic matters
- Mars, courage, sports, surgery, disputes
- Mercury, study, trade, writing and communication
- Jupiter, learning, finance, weddings and ceremonies
- Venus, love, marriage, art, luxury and vehicles
- Saturn, labour, construction and long-term work
Why only four horas are marked auspicious
The list above is the classical rule of matching a task to its governing planet. Tradition gives a Mars hora to contests and a Saturn hora to heavy or enduring work. That is a different question from whether an hour is auspicious in general.
For the general reading, this page marks only the horas of the natural benefics as auspicious, or Shubh: Jupiter, Venus, Mercury and Moon. The horas of Sun, Mars and Saturn are not marked. That is why a Saturn hora can be the right hour for construction and still not be flagged as a favourable time to begin something auspicious. Use the planet-to-task list when the task has a clear planetary character, and the auspicious marking when it does not.
The Hora and the day’s inauspicious periods
A favourable hora is only half the picture. Three periods fixed by weekday (Rahu Kaal, Yamagandam and Gulika) also fall in the daytime. Each takes one-eighth of the day (about an hour and a half), and a hora is about an hour. So a band does not sit on one hora. It runs across two or three of them, covering part of each.
So a good Jupiter or Venus hora clipped by Rahu Kaal is not entirely lost. Tradition begins no new or auspicious work during the kala-vela, so the rule is simple: use only the minutes of a good hora that fall outside the band. The timeline above marks every hora a band touches, with the exact overlapping window. The kala-vela strip gathers the day’s three periods, and the clear-windows strip lists the auspicious horas that no band touches at all.
Take the good planetary hours, remove Rahu Kaal, Yamagandam and Gulika, and what remains are the clear windows.
