Panchang means five limbs, and most people can only name two

Open a panchang and you get a block of Sanskrit with timestamps hanging off it. Most people learn to find the single line they came for, the festival date or the rahu kaal band, and treat everything above it as ornament. It isn't ornament. Those five entries are the entire document, and the word on the cover says as much.

A panchang is a Hindu almanac that describes a moment using five measurements: tithi, vara, nakshatra, yoga and karana. Panchanga is Sanskrit for five limbs, from pancha (five) and anga (limb). Everything else a panchang prints, from the muhurat windows down to the festival markers, is derived from those five.

Tithi, the gap between the Moon and the Sun

A tithi is the time the Moon takes to pull 12 degrees further ahead of the Sun. Thirty of them make a lunar month, 15 in the waxing Shukla Paksha and 15 in the waning Krishna Paksha.

Because the Moon's speed varies across its orbit, a tithi is not a fixed length of clock time. It can run anywhere from roughly 19 to 26 hours, which is why a tithi drifts against the calendar date and why a festival sometimes appears to land on two different days depending on who you ask. That mismatch has its own post: why a tithi and a date are not the same thing covers the day boundary properly, so I'll leave it there.

Vara, the limb that ignores the sky

Vara is the weekday, and it is the one limb you can state without looking anything up. Seven days, each carrying a planetary lord: Ravi for Sunday, Soma for Monday, Mangal, Budh, Guru, Shukra and Shani through to Saturday.

It is worth noticing how odd this is. The other four limbs are angles, calculated from where two bodies actually sit. Vara is a count that just keeps going, unbroken, regardless of what the Moon is doing. It ended up in the set because muhurat rules constantly pair a weekday with something else, and a good many of them only bite when a particular vara and a particular tithi or nakshatra coincide.

Nakshatra and yoga run on the same ruler

Both divide the zodiac into 27 parts of 13 degrees 20 minutes, which is 800 arcminutes apiece. The count is identical, the unit is identical, and readers routinely assume the two entries are saying much the same thing. They are not measuring the same object.

Nakshatra takes the Moon's longitude on its own and asks which of the 27 segments it falls in. Yoga takes the longitude of the Sun and the longitude of the Moon, adds them, and asks the same question of the total. Twenty seven names run from Vishkambha through Priti, Ayushman and the rest, ending at Vaidhriti, with Vyatipata and Vaidhriti treated as the two to avoid for anything you actually care about.

Since the sum climbs faster than the Moon alone, a yoga turns over at a different pace from a nakshatra, and the two entries change at unrelated times of day. Our guide to the nakshatras handles the Moon side in depth. Yoga is the limb with essentially no popular following, partly because nobody has built a personality quiz on top of it.

Karana, and where the number 60 comes from

A karana is half a tithi, so it covers 6 degrees of separation instead of 12. Two karanas per tithi across 30 tithis gives exactly 60 karana slots in a lunar month, filled from a set of only 11 names.

The arithmetic behind that is tidier than most numbers quoted in astrology, and you can check it in a minute. Seven of the eleven are movable, meaning they cycle repeatedly: Bava, Balava, Kaulava, Taitila, Garaja, Vanija and Vishti, each appearing eight times, which accounts for 56 slots. The remaining four are fixed and appear once each, clustered around the new moon. Shakuni holds the second half of Krishna Chaturdashi, Chatushpada the first half of Amavasya, Naga the second half of Amavasya, and Kimstughna the first half of Shukla Pratipada. That is 56 plus 4, and the month closes at 60 with nothing left over.

Vishti is the one you have met, because Vishti is Bhadra, the window that quietly cancels muhurats across the entire festival calendar. If a wedding time or a rakhi window has ever been described to you as blocked until mid morning, a karana was doing that. Bhadra kaal has its own explainer, including the honest note about how its sub windows are calculated.

Why do five limbs come down to two bodies?

Set the weekday aside and the remaining four limbs are all built from the positions of the Sun and the Moon. Nothing else in the sky is consulted. Tithi is the difference between them, karana is that same difference at double resolution, nakshatra is the Moon alone, and yoga is the two of them added together.

So a panchang asks three questions about a pair of objects: where is the Moon, how far has it moved from the Sun, and what do they come to combined. Jupiter, Saturn and the nodes sit this out entirely. They belong to the chart, not to the almanac.

That is a fairly startling amount of ritual infrastructure resting on two bodies, and I think it is the single most useful thing to understand about the document. Once the structure is visible, the vocabulary stops being a wall. You are reading a small number of measurements described in a lot of words.

How do you actually read one without memorising it?

Start with the convention that trips up almost everybody: panchang entries are usually printed as end times, not durations. A line reading Chaturthi until 07:44 AM means the tithi finishes then, having started the previous morning.

After that, read for what you need. A festival date is settled by tithi, sometimes qualified by which part of the day it has to cover. A muhurat check normally means confirming that a bad yoga or a Vishti karana is not sitting on top of your window. The nakshatra line matters for personal observances and for naming ceremonies. Very little of a panchang needs to be read on any given day.

What a panchang cannot do is tell you how the day will go for you specifically. It describes the position of two bodies and the conventions a tradition has built around them, which is a statement about the sky rather than about your life. Useful for coordinating with people, and genuinely useful for understanding why your family does things on the days they do. Not a forecast, and not a reason to postpone something that matters to you.