The eight prahars, and why they are not hours

A clock that starts at sunrise

A prahar is a watch of the day. Eight of them make a full cycle: four from sunrise to sunset, four from sunset to sunrise. Divide them evenly and each is three hours, which is how most people first meet the idea and how most charts print it.

That is a convenience, not the system. The prahars are solar. The first begins when the sun actually rises where you are standing, and the fourth ends when it sets. In Delhi in June the sun is up for nearly fourteen hours, so a day prahar runs close to three and a half; in December it is barely two and three quarters. The night prahars take up the slack. Nobody adjusted this for the clock because the clock was not the thing being measured.

This matters more than it sounds. If you practise Bhairav at six in the morning in June you are an hour into full daylight and the raag is already out of its hour. The same clock time in December is still dark. The hour was never the number on the dial; it was the light.

The names, and the disagreement

The day watches are named consistently across sources: Pratah, Purvahna, Madhyahna, Aparahna — dawn, mid-morning, midday, afternoon. The night set is where texts begin to differ. Pradosh and Nishith are usual for the first two; after that you will find Triyama, Madhyaratri, Usha and others, in various orders, depending on which tradition the writer learned.

This site uses the most commonly cited forms and says where there is an alternative. If you learned different names, you are not wrong and neither is the chart. The eightfold division is old and widely agreed; its vocabulary is not.

Sandhi prakash: the junction raags

Two moments in the cycle are treated differently from all the others: the hour around sunrise and the hour around sunset. These are the sandhi — the junctions — and the raags that belong to them are called sandhi prakash raags.

They share a feature. They use komal Re — the flattened second — and that interval leaning hard on Sa is what the junction sounds like. Bhairav at dawn, Marwa and Purvi at dusk, Lalit in the last dark before light. Bhatkhande built a good deal of his time theory around exactly this observation: which form of Re and Dha a raag uses tells you which half of the cycle it lives in.

Play Bhairav after nine in the morning and it sounds like grief for no reason. Play it before the light comes and the same phrase sounds like patience. Nothing in the notes changed. Only the hour did.

How firm is any of this

Firmer in some places than others. That Bhairav is a dawn raag, that Yaman opens the evening, that Darbari belongs to the small hours — these are not seriously disputed by anyone. They appear the same way in Bhatkhande, in Jairazbhoy, in every gharana's teaching, and in the concert habits of the last century.

Other placements are looser. Some raags are claimed by two watches depending on region or lineage. Some are described by their parent thaat's hour rather than by their own practice. And a great many raags simply have no strong time association at all, whatever a tidy chart may imply.

Each raag page on this site states how well attested its hour is, and says plainly when the attestation is weaker than usual. A chart that pretends to equal certainty everywhere is a chart that is lying somewhere.

What to do with it

Practise what belongs to the hour you are in. Not out of superstition — the raags were shaped by people who sang them at those hours for generations, and the shapes carry the hour in them. You are hearing an argument that has already been settled by use.

And if you must practise a dusk raag at breakfast, do it. The hour simply will not help you, and you will find you have to supply what it would have supplied. That, too, is worth learning once.