What Is a Panchang? The Hindu Calendar and Its Five Limbs, Explained

Why does Diwali fall in October one year and November the next? Why does a family consult an almanac before choosing a wedding date, and why can the same festival be celebrated on different days in different parts of India?

Almost every one of those questions leads back to the same book — or these days, the same page or app screen: the panchang. Here is what it is, what its five parts mean, and how people use it.

An almanac, not just a calendar

A panchang is a traditional Hindu almanac that combines a calendar with astronomical information. The word comes from Sanskrit: pancha means five, and anga means a limb or part — five pieces of time-reckoning that, taken together, describe the character of a day.

Printed panchangs have been published for centuries and remain a fixture in many Hindu homes, often hanging on a wall or kept near the household shrine. Each year's edition is calculated in advance by almanac-makers trained in jyotisha, the classical Indian science of astronomy and timekeeping; today the same calculations appear in digital form. Crucially, the panchang is not only about marking dates — it is about the quality of time.

The five limbs, in plain language

1. Tithi — the lunar day

The tithi is the backbone of the panchang. It is a lunar day, defined by the moon's position relative to the sun: one tithi is the time the moon takes to move twelve degrees further from the sun.

A lunar month has thirty tithis. The fifteen from new moon to full moon form the waxing half, Shukla Paksha; the fifteen from full moon back to new moon form the waning half, Krishna Paksha. Familiar names include Pratipada (first), Ekadashi (eleventh), Purnima (full moon), and Amavasya (new moon).

Because a tithi is an astronomical interval rather than a clock day, it does not line up neatly with midnight-to-midnight dates. A tithi can begin and end at any time of day — mid-morning, late evening, or before dawn — and can last slightly less or more than twenty-four hours. This is why a festival tied to a tithi may appear to shift, and why a tithi is occasionally repeated or skipped on the civil calendar.

2. Vara — the weekday

Vara is the simplest limb: the day of the week, Sunday to Saturday, associated as in many cultures with the sun, the moon, and the five visible planets. Each weekday carries traditional associations — Monday with Shiva, for example — and many devotees keep a weekly fast on a particular vara in honor of a chosen deity.

3. Nakshatra — the lunar mansion

As the moon travels through the sky each month, it passes through twenty-seven star groups called nakshatras, spending roughly a day in each; the panchang names the one the moon occupies that day. Many festivals and birthdays are reckoned by nakshatra rather than by solar date, especially in South India, where a person's birth star is honored monthly and each year.

4. Yoga — the combined movement of sun and moon

Yoga, in this context, has nothing to do with postures or breathing exercises. It is a calculation: the positions of the sun and moon along the zodiac are added together and divided into twenty-seven named yogas, such as Siddhi, Amrita, and Shubha. Each carries a traditional character — some favorable, others less so.

5. Karana — the half-tithi

A karana is half of a tithi: with thirty tithis in a lunar month, there are sixty karanas, cycling through eleven names. It is the most technical limb, used with tithi and nakshatra to refine the choice of an auspicious moment.

How the panchang is used: festivals and muhurta

The most visible use of the panchang is setting the festival calendar. Most Hindu festivals are defined by tithi, sometimes combined with nakshatra and the time of day at which the tithi prevails. Diwali falls on Amavasya, the new-moon tithi of its month; Ekadashi fasts fall on the eleventh tithi of each half-month; Guru Purnima falls on the full moon.

The second great use is muhurta: choosing an auspicious time to begin something important. Weddings are the classic example, but muhurta is also consulted for housewarmings, starting a business, naming a baby, or beginning a journey. A good muhurta weighs the five limbs together — a favorable tithi, a suitable nakshatra, a supportive yoga and karana, on an appropriate weekday.

In daily life, most people use the panchang more simply: checking today's tithi and nakshatra or confirming a festival date. In Faith Map, See today's Panchang in Faith Map — the Hindu track shows today's panchang elements, with reading and lessons free.

Why festival dates move every year

The Hindu calendar is lunisolar: its months follow the moon, but the year is kept in step with the sun and the seasons. Twelve lunar months total only about 354 days, eleven days short of the solar year; left uncorrected, festivals would drift through the seasons. The correction is an extra month, Adhika Maas, inserted about every two to three years. That is why festivals move within a window of a few weeks on the Gregorian calendar rather than wandering across the year: Diwali stays in autumn and Holi in spring, but the exact date shifts each year.

One system, many regional almanacs

There is no single panchang for all of India, and the variations are a respected part of the tradition. The largest difference is how the lunar month is counted. In the amanta system, used in much of South and West India including Maharashtra, Gujarat, and Tamil regions, the month ends at the new moon; in the purnimanta system, used in much of North India, it ends at the full moon. The tithis are identical — only the month names differ, by about two weeks.

Regional almanacs — Tamil, Gujarati, Marathi, Bengali, Malayalam, and others — also reflect local customs and regional new years. Two families in two states can consult two different panchangs, celebrate on adjacent days, and both be following their tradition correctly.

A living guide to sacred time

The panchang endures because it answers a question a simple calendar cannot: not just what day is it?, but what kind of day is it? — where the moon stands, which stars it visits, and what the day is suited for. It remains a beautiful example of a faith woven into the measurement of time itself. Your faith is beautiful — and so is the calendar it keeps.