Vara — The Weekday

At first glance, vara (वार) — the weekday — seems like the easiest of the five limbs. Today is Tuesday. Tomorrow is Wednesday. What more is there to say?

Quite a lot, as it turns out. The order of the days of the week is not an arbitrary cultural convention. It is the answer to a specific astronomical question, and the answer involves a small but very satisfying piece of arithmetic that every literate person before the modern age knew, and almost nobody learns today. By the end of this chapter, you will know why the sequence is Sun → Moon → Mars → Mercury → Jupiter → Venus → Saturn — and why this same order shows up in calendars across India, Babylon, Greece, and Rome.

Seven days, seven grahas

The Indian week, like the Western one, has seven days. Each day is named for one of the seven luminaries — that is, the five classical planets visible to the naked eye plus the Sun and the Moon. (Rahu and Ketu, the lunar nodes, do not get weekdays of their own. They are not luminaries; they are the points where the Moon’s orbit crosses the ecliptic. We will meet them in the chapter on grahas.)

Notice that the correspondence between Indian and Western weekdays is exact. Both traditions associate the same day with the same graha. Sunday is the Sun’s day in Sanskrit, English, Latin, and Greek. Tuesday is Mars’s day in all of them, even though the names of the war-god change between cultures (Mangala, Mars, Tiw, Ares). This is not a coincidence and not a borrowing in either direction. The seven-day week with this specific planetary order is one of the most widely documented cross-cultural inheritances in human history, appearing independently in Babylonian astronomical records, the Hellenistic world, and Indian texts roughly contemporaneously.

Why this particular order?

Here is the puzzle. Suppose you wanted to put the seven luminaries in some order. You could pick any order. Why specifically Sun → Moon → Mars → Mercury → Jupiter → Venus → Saturn?

Note that this order is not the order of distance from Earth. That order, in the geocentric system used by all classical astronomy (Indian and Greek alike), is — from closest to Earth outward — Moon, Mercury, Venus, Sun, Mars, Jupiter, Saturn. This sequence reflects the apparent speed of each body across the sky: the Moon completes its cycle in ~29 days, Mercury in ~88, Venus in ~225, the Sun in ~365, Mars in ~687, Jupiter in ~12 years, Saturn in ~29 years. Slower-moving bodies were inferred to be more distant, since something farther away takes longer to traverse a given angle.

So the Chaldean order (the geocentric order by orbital period) is:

Saturn → Jupiter → Mars → Sun → Venus → Mercury → Moon

Slowest to fastest. But the days of the week are not in this order. They jump around: Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn. The pattern is hidden, but it is exact.

The hora system: hours of the day are also planetary

Here is the key idea. In the classical scheme, the day from sunrise to next sunrise is divided into 24 hours (the hora (होरा)— the same word that gives us the English “hour”), and each hour is also ruled by one of the seven grahas, in the Chaldean order, repeating cyclically.

The first hour of any day is ruled by the same graha that rules that day — that is the definition of the day’s ruling graha. So:

• On Sunday (Sun’s day), hour 1 is ruled by the Sun.
• Hour 2 is the next graha in the Chaldean order after the Sun — counting outward from the slowest. The Chaldean order from slowest is Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon — and we cycle through it. After Sun comes Venus. So hour 2 is Venus.
• Hour 3 is Mercury. Hour 4 is the Moon. Hour 5 is Saturn. Hour 6 is Jupiter. Hour 7 is Mars. Hour 8 cycles back to the Sun. And so on.

After 24 hours we have looped through the seven planets three full times (3 × 7 = 21) and three more steps beyond that. So:

• Hour 1 of Sunday: Sun
• Hour 22 of Sunday (= hour 1 of cycle 4): Sun
• Hour 23: Venus
• Hour 24: Mercury
• Hour 1 of the next day: the graha after Mercury in the Chaldean order, which is the Moon.

And so the day after Sunday is Monday — the Moon’s day. The same calculation, repeated:

• Monday hour 1: Moon. Hour 24 falls on Mars (count 24 steps through the Chaldean cycle starting from Moon). Hour 1 of the next day: Mars. Tuesday.
• Tuesday hour 1: Mars. Hour 24 + 1 lands on Mercury. Wednesday.
• Wednesday → Jupiter. Thursday.
• Thursday → Venus. Friday.
• Friday → Saturn. Saturday.
• Saturday → Sun. Sunday again.

And the cycle closes.

This derivation is preserved in classical Indian texts (the Brihat Samhita of Varahamihira, ~550 CE, and earlier), in Greek texts (Vettius Valens, ~150 CE), and in Babylonian astronomical tablets even earlier. It is a piece of pure arithmetic that yielded the same answer to multiple civilisations, because the underlying mathematics is universal.

The day starts at sunrise — but the hora starts at sunrise too

The 24 horas of a day do not all have to be of equal length. In the strict classical scheme, there are two sub-traditions.

• Equal horas. Sunrise to next sunrise is divided into 24 hours of 60 minutes each. Used for routine calculation.
• Day-night unequal horas.The interval from sunrise to sunset is divided into 12 daytime horas, and sunset to next sunrise into 12 nighttime horas. In summer, when the day is longer, daytime horas are longer than 60 minutes and nighttime horas are shorter; in winter the reverse. This is the classical “temporal hour” of the Greek and Indian texts. It produces the same hora assignment to each hour-slot, just with different real durations.

For the purpose of weekday assignment, both schemes give the same answer, because the 24-hour sum is the same either way. For finer-grained electional astrology — “during which hour of today is Jupiter most favourable for starting a new venture?” — the unequal-hora scheme is what is traditionally used.

What each vara is associated with

Once you know which graha rules a day, the qualities associated with that graha colour the day. We will go into the grahas in detail in their own chapter; this is a quick preview.

Ravivara — Sunday रविवार

Ruled by Surya (Sun). Associated with vitality, leadership, authority, the soul, the father. Worship of the Sun is traditional on Sundays. The colour is red or saffron. Foods avoided by some traditions on Sunday include salt and oil. Rituals like Surya Namaskar and the chanting of the Aditya Hridayam stotra are associated with this day.

Somavara — Monday सोमवार

Ruled by Chandra (Moon). Associated with the mind, emotions, peace, water, the mother. Worship of Shiva is associated with Mondays — especially during the month of Shravana — because Shiva wears the crescent moon. The colour is white. Mondays in Shravana are observed as a fast in many regions; the sixteen-Monday vow (Solah Somvar) is taken by women seeking marriage or marital harmony.

Mangalavara — Tuesday मंगलवार

Ruled by Mangala (Mars). Associated with energy, courage, siblings, conflict, blood, surgery. Worship of Hanuman is associated with Tuesdays in much of North India — Hanuman is considered an aspect of, or under the protection of, Mars. The colour is red. The day is considered inauspicious for certain activities (cutting hair, starting a journey westward) by some traditions but auspicious for activities requiring courage.

Budhavara — Wednesday बुधवार

Ruled by Budha (Mercury). Associated with intellect, communication, commerce, learning, scholars. Worship of Ganesha is associated with Wednesdays — Ganesha is the deity of wisdom and removes obstacles to clear thinking. The colour is green. The day is considered auspicious for academic beginnings, business launches, and signing contracts.

Guruvara — Thursday गुरुवार

Ruled by Guru (Jupiter, also called Brihaspati). Associated with wisdom, teachers, religion, dharma, expansion, gold. Worship of Vishnu is traditional on Thursdays, as is the worship of one’s personal guru. The colour is yellow. Thursday is considered universally auspicious — for marriages, beginning spiritual practices, taking vows, and launching long-term endeavours.

Shukravara — Friday शुक्रवार

Ruled by Shukra (Venus). Associated with love, marriage, the arts, beauty, vehicles, luxury, women, the goddess. Worship of Lakshmi and Durga is traditional on Fridays. The colour is white or light pastel. Friday is considered auspicious for marriage, romance, artistic undertakings, purchasing ornaments and clothing, and devotional worship of female deities.

Shanivara — Saturday शनिवार

Ruled by Shani (Saturn). Associated with discipline, slow but permanent gains, justice, suffering, hard work, longevity, servants, the marginalised, machinery, and karma. Worship of Shani himself, of Hanuman (who is said to protect against Shani’s harshness), and of Bhairava is traditional on Saturdays. The colour is black or dark blue. Saturday is considered inauspicious for new ventures by some traditions but ideal for deeply considered, long-term commitments — the opposite of impulsive starts.

These associations are not arbitrary either. They follow from the Sanskrit semantic field around each graha, the visual appearance of the body (Mars looks red; the Moon looks pale; Saturn moves slowly and is dim), and centuries of ritual accretion. Whether you accept the predictive layer or not, the associations are coherent and well-documented.

The vara starts at sunrise — and the boundary case

In the modern civil calendar, a day begins at midnight. In the Indian tradition, as we have seen, a day begins at sunrise. So what about the period between midnight and sunrise — say, 2 AM on what your phone calls Tuesday? In the panchang sense, that is still Monday (Somavara), because Tuesday does not begin until sunrise.

This matters when reading classical texts. A statement like “the eclipse occurred on Saturday at the second prahar of the night” is talking about the night that follows Saturday daytime — so it is what your modern clock would call Sunday morning, perhaps 1 AM Sunday. The traditional vara has not yet rolled over because the sun has not yet risen.

Vara and the seven-day cycle in Jain tradition

Jain texts adopt the same seven-vara cycle and the same graha rulerships, but Jain ritual life often foregrounds the lunar calendar (tithi, paksha, month) more strongly than the weekday. Major Jain observances are pinned to tithis, not varas. The vara features in the panchang as one of the five limbs and as a factor in determining choghadiya (which we will see in a later chapter), but it does not carry the same festival weight that tithi does.

Some Jain communities do observe particular practices on specific varas — for example, the avoidance of certain foods on certain days as part of dietary discipline. These conventions vary by region and sect.

Why is the week seven days at all?

We often take seven for granted, but it is worth asking. There is no astronomical event with a seven-day period. The Moon does not return to anything every seven days. Earth does not. There is no observational astronomical reason for a seven-fold week.

The most likely answer is that seven was chosen because it is roughly a quarter of the synodic month: 29.5 ÷ 4 ≈ 7.4 days. The four phases of the Moon — new, first quarter, full, last quarter — are roughly seven-day intervals, and watching the Moon’s phase is the simplest naked-eye calendar a non-literate community can keep. This connection to the lunar phases is preserved in many cultures: the Babylonian seven-day week, the Hebrew Sabbath cycle, the Greco-Roman planetary week, and the Indian saptaha all share roots that very likely go back to a lunar phase observation.

Then, on top of the seven-day count, the seven luminaries (Sun, Moon, five visible planets) provided seven natural objects to assign to each day — a remarkable coincidence that fixes the system across cultures.

What you should be able to do now

After this chapter, you should be able to:

• Name the seven varas and the graha that rules each.
• State the Chaldean order (Saturn-Jupiter-Mars-Sun-Venus-Mercury-Moon from slowest to fastest geocentric apparent motion).
• Derive the weekday sequence from the hora rule: 24 hours mod 7 planets = 3 steps forward in the Chaldean order each day.
• Explain why the vara matches between Indian and Western calendars day-by-day, and why this is not coincidence.
• State the qualitative association of each graha with its vara (vitality for Sun, mind for Moon, etc.).
• Distinguish equal-hora vs day-night unequal-hora schemes, and know which is used for vara determination.
• Correctly read a classical reference like “the second prahar of Saturday night” and identify what civil clock time it points to.

Open the daily panchang on this site. Today’s vara is at the top. Note its ruling graha. Now check tomorrow’s vara — its graha should be the one you reach by counting three steps forward in the Chaldean order from today’s ruler. If today is Tuesday (Mars), three steps forward in Saturn-Jupiter-Mars-Sun-Venus-Mercury-Moon should give you Mercury. And tomorrow is indeed Wednesday — Mercury’s day. The mathematics works.

In the next chapter we move from the simplest of the five limbs to the most ornate — the nakshatra, the 27 lunar mansions. Each nakshatra has a name, a symbol, a deity, and a character; together they form the most ancient layer of Indian sky-mapping, predating even the twelve-rashi zodiac.