Gowri Panchangam: the day's 8 segments explained step by step

Gowri Panchangam is a time rhythm. It tells you which parts of the day are suited for important decisions, and which ones you should let pass.

Imagine daylight as a cake, and you cut it into eight equal slices. Each slice gets a name. Five of the names mean "good", that is when you start new work, sign contracts, or have important conversations. The other three mean "bad", that is when you stay quiet.

The system comes from the Tamil panchangam, the classical almanac that has governed everyday planning in Tamil Nadu for centuries. The Gowri table is printed in every panchangam calendar, and millions of people look it up every morning.

There are eight names, and they always appear in the same order. The names are cyclic: after the eighth comes the first again. Good and bad do not alternate: each segment is ruled by its own graha, and five of the eight grahas count as benefic.

The sequence of the eight names is always the same. The only thing that changes from day to day is which name starts.

Each segment covers exactly one eighth of daylight, from sunrise to sunset. The first segment begins at sunrise. The eighth ends at sunset. Which Gowri fills the first segment depends on the weekday.

This means every weekday except Tuesday and Saturday begins with an auspicious segment. Tuesday opens on Rogam and Saturday on Soram. But there are always five good windows during the day, they just fall at different times.

Let us compute all eight segments for a Thursday in Chennai.

The table below shows which Gowri names fall in each segment for all seven days. Clock times vary with the season, but the name sequence is always the same.

The name sequence never changes. But each segment lasts longer in summer and shorter in winter, because daylight is longer.

In Chennai the difference is moderate: daylight swings between about 680 and 775 minutes over the year. That gives segments of 85–97 minutes. In Copenhagen the swing is far larger: from about 420 minutes in December to over 1,053 minutes in June. That gives segments from 53 to 132 minutes.

That is why you cannot simply memorise clock times from a printed calendar. They apply only to the city and the day the calendar was made for. If you live somewhere else, or look at a different day, you need to compute them from your own sunrise and sunset.

In Tamil tradition, the Gowri table is the first thing many people look up in the morning. It is used to choose when to start something important: a job offer, a contract, a move, a journey, a property purchase.

• Starting new work? Choose Uthi, Amirdham, Laabam, Dhanam or Sugam.
• Signing something important? Avoid Rogam, Soram and Visham.
• Planning a journey? Check that you depart during a good segment.
• Cannot avoid a bad segment? Start a small symbolic action in the preceding good segment, write the first line of an application, for instance, and continue from there.

The system we have described covers the day, from sunrise to sunset. There is an analogous night division: from sunset to the next sunrise, also eight segments, with the same names in a shifted sequence.

In practice most people only use the daytime table, and that is what the printed panchangam calendars show. Our calculator therefore also shows daytime only.