The Study of Jyotisha · Chapter 39 of 54 · Part Eight · The applied branches

#Muhurta: choosing a time

#What muhurta is

A muhurta is, strictly, a unit of time: one-thirtieth of a day and night, about 48 minutes. The day has fifteen muhurtas and the night fifteen, each with its presiding deity (Brihat Samhita 99, with Iyer's note). By extension, muhurta means an auspicious moment chosen for beginning something, and the branch of Jyotisha that chooses such moments — called "electional astrology" in the West.

The idea is simple: an undertaking begun at a good moment shares in that moment's quality, as a person shares in the quality of their birth moment. Varahamihira puts it in a royal setting: "A king who starts on a journey when the planets are in benefic places will gain his object though he might possess little power" (Brihat Samhita 104.60).

Muhurta is the most widely used part of Jyotisha in India today. Weddings, house-warmings, the start of a business, the naming of a child, the purchase of a vehicle — all are commonly timed. The main sources are Varahamihira's Brihat Samhita (chapters 98–100, 103), the later Muhurta Chintamani of Rama Daivajna, and, in the south, the Kalaprakasika, which N. P. Subramania Iyer translated into English in 1917.

#Step 1: the five limbs

The first checks are the five limbs of the day's panchanga (Chapter 5). Each limb has good and bad values for different undertakings.

The tithi. Varahamihira divides the fifteen tithis of each half-month into five groups (Brihat Samhita 99.2):

The "empty" tithis are avoided for most auspicious beginnings: for marriage, the lunar day should be "other than a Rikta one" (Brihat Samhita 100). The new-moon day is sacred to the ancestors (99.2).

The weekday. For marriage, "the weekday other than that of a malefic planet" (Brihat Samhita 100): not Sunday, Tuesday or Saturday. Other undertakings have their own preferred days.

The nakshatra. Each nakshatra suits certain kinds of work. For marriage, Varahamihira gives eleven: Rohini, the three Uttaras, Revati, Mrigashira, Mula, Anuradha, Magha, Hasta and Swati (Brihat Samhita 100.1). Later books sort the nakshatras into classes — "fixed" nakshatras (Rohini and the three Uttaras) for lasting things such as building a house, "movable" ones for travel, and so on (for example Kalaprakasika, on fixing the doors of a house).

The yoga. For marriage, "the yoga neither Vyatipata nor Vaidhriti" (Brihat Samhita 100). Later lists add others.

The karana. Of the eleven karanas, Vishti (also called Bhadra) is avoided for all auspicious work: "auspicious deeds shall not be done" in it (Brihat Samhita 99.7). Varahamihira gives each karana its suitable work (99.6–8).

#Step 2: the personal checks

A time good for everyone may still be poor for a particular person. Two checks relate the moment to the person's birth chart:

The nine taras (tarabala). Count from the person's birth nakshatra to the day's nakshatra (counting the birth star as 1), and divide by 9; the remainder (9 if none) gives the tara (Kalaprakasika XXXIII):

The 3rd, 5th and 7th taras are avoided.

The Moon's transit (chandrabala). The Moon's sign on the day, counted from the birth Moon, should be one of its good transit places: the 1st, 3rd, 6th, 7th, 10th or 11th (Brihat Samhita 104.4, Chapter 24).

#Step 3: the chart of the moment

Finally, the hour is chosen so that the chart cast for the moment of beginning is good. Varahamihira's general rule:

All works commenced when the 12th house, the kendras and the 8th house are not occupied by planets, when malefic planets occupy the 3rd, 6th and 11th houses, and when Jupiter or Venus occupies the rising sign or one of the kendras, will end successfully. House-building or entry into a house shall be commenced when the rising sign is benefic to the person or when it is a fixed sign (Brihat Samhita 98.18, Iyer).

Since the ascendant changes every two hours or so, this step picks the hour within a chosen day.

#The daily periods: Rahu kalam and others

Many panchangas print daily periods to avoid, especially in South India: Rahu kalam, Yamagandam and Gulika kalam, each about an eighth of the daytime. What do the sources say?

• Gulika, Yamagandam and similar periods are classical: the day is divided into eight parts ruled in turn by the planets from the weekday's lord, and Saturn's part is Gulika, Jupiter's is Yamaghantaka (Brihat Parashara Hora Shastra 3.66–70). The Kalaprakasika gives the tables (1917, pp. 175–176) — and its own note says Gulika "is not considered inauspicious, though included in this chapter".
• Rahu kalam has no planetary basis and appears in no classical text found in this course's research. The earliest witness found is a short paragraph in the 1917 Kalaprakasika, which says it "occurs only during the day-time" (p. 176). A modern translator of the late South Indian text Uttara Kalamrita notes that standard texts do not mention it and that it is observed mainly in Tamil Nadu, Karnataka and Kerala.

So Rahu kalam is a regional custom, not a classical rule. There is no harm in respecting it — but no reason to fear it.

#A worked example

Suppose the example person (birth star Rohini, birth Moon in Taurus) wants a good day in late November 2026 to begin an important project. The panchanga for Thursday, 26 November 2026, at 10:00 in Hyderabad:

Six checks pass and one fails. This is typical: a perfect day is rare. The later books discuss which faults may be overlooked and which may not, and different authorities rank the factors differently. A nearby alternative, Saturday 21 November (Revati, Siddhi yoga, Sadhaka tara, the Moon in Pisces, the 11th from Taurus), passes the personal checks but falls on Saturn's day.

The final step would be to choose the hour on the chosen day when a good ascendant rises with the kendras and the 8th and 12th clear of malefics (Brihat Samhita 98.18).

#Using muhurta well

Muhurta can be harmless and even helpful: choosing a time encourages people to plan, to pause before a big step, and to mark it as important. But it can also be misused:

• It cannot be tested in any ordinary life: one never knows how the same undertaking would have gone at another time.
• Never delay necessary action — medical treatment above all — for a muhurta.
• Never pay large sums for an "auspicious time". The rules are public, simple and (as this chapter shows) computable by anyone.
• Never treat a missed muhurta as a curse. A marriage begun at an imperfect time is not doomed; most marriages in history were begun at imperfect times.

#Summary

• A muhurta is a 48-minute unit, and by extension an auspicious moment chosen for a beginning (Brihat Samhita 99, note).
• Step 1: the five limbs — avoid Rikta tithis, malefic weekdays (for marriage), unsuitable nakshatras, Vyatipata and Vaidhriti yogas, and Vishti karana (Brihat Samhita 99–100).
• Step 2: the personal checks — the nine taras from the birth star (Kalaprakasika XXXIII) and the Moon's transit from the birth Moon (Brihat Samhita 104.4).
• Step 3: the chart of the moment — kendras, 8th and 12th clear, malefics in the 3rd, 6th and 11th, Jupiter or Venus angular (Brihat Samhita 98.18).
• Gulika and Yamagandam are classical; Rahu kalam is a regional custom without a classical source.
• A perfect time is rare; never delay necessary action or pay large sums for a muhurta.

#Exercises

1. Which tithis are Rikta? Why are they avoided?
2. A person's birth star is Ashvini. Today's star is Krittika. Which tara is it, and is it good?
3. Name three of Varahamihira's eleven marriage nakshatras.
4. What does the Kalaprakasika say about Rahu kalam, and what does that tell you about its status?
5. A friend wants to postpone surgery by two weeks to wait for a better muhurta. What would you say?

Answers: 1. The 4th, 9th and 14th of each half-month; "empty" tithis are avoided for auspicious beginnings (Brihat Samhita 100). 2. Ashvini 1, Bharani 2, Krittika 3: Vipat (danger) — avoided. 3. Any three of: Rohini, Uttara Phalguni, Uttara Ashadha, Uttara Bhadrapada, Revati, Mrigashira, Mula, Anuradha, Magha, Hasta, Swati. 4. That it occurs only in the daytime, in a short note-like paragraph; no classical text found gives it, so it is a regional custom rather than a classical rule. 5. That medical decisions belong to the doctor; the tradition itself does not ask anyone to endanger their health for a muhurta, and no muhurta is worth that risk.