Bohag Bihu

Significance and Story

Bohag Bihu is the Assamese new year, observed as the Sun enters Mesha. In the Assamese calendar this day is counted as Bohag 1 — the first day of the month of Bohag, and the opening of the new year. The festival belongs to Assam, and it is kept as a new year observance rather than as the veneration of a single presiding deity; the brief records no deity for this festival.

Because it is tied to the solar ingress into Mesha, Bohag Bihu marks a turn in the agricultural and seasonal year as much as a turn in the calendar. It arrives at the point where the sun leaves the previous sign and enters Mesha, which is why the observance is described simply as "Sun enters Mesha (Bohag 1)". The name Bohag is the Assamese form of the month; Bihu is the name of the festival cycle itself.

Readers who follow jyotish will recognise this as a sankranti-based observance rather than a tithi-based one. That distinction matters for how the date is arrived at, and it is the reason the festival is fixed by solar ingress rather than by the movement of the Moon.

How the Date Is Fixed

The date of Bohag Bihu is determined from the panchang. Specifically, it is observed on the day the Sun enters Mesha, counted as Bohag 1. The exact Gregorian date changes from year to year because the solar ingress does not fall on the same civil date annually; the dates for the current year are computed from the panchang and shown on this page.

Two details are worth noting for anyone comparing calendars.

• Solar ingress, not tithi. Because the anchor is the Sun's entry into Mesha, the calculation follows the solar calendar. Tithi and nakshatra are not the deciding factor here, unlike many lunar festivals.
• Place and ayanamsha. The moment of ingress is a single astronomical instant, but the civil day on which it is observed depends on the sunrise of a given place. Dates on this page are computed for New Delhi sunrise with Lahiri ayanamsha.

This is also why the date can appear to differ between sources. A festival fixed by a tithi, a nakshatra or a solar ingress at a particular place can shift by a day between cities, and can be listed differently under amanta and purnimanta reckoning. Where traditions differ, the difference is usually one of local convention rather than of the underlying astronomy. For personal charts and for questions about how a specific family or region reckons the day, consulting a qualified jyotishi is the appropriate step.

Puja Vidhi

The brief records no presiding deity for Bohag Bihu, and it does not prescribe a specific puja vidhi. What the brief does record is the observance itself: Bohag Bihu is the Assamese new year, kept on the day the Sun enters Mesha, counted as Bohag 1, in Assam.

Because the observance is a new year rather than a deity-centred vrata, the vidhi followed in a given home is a matter of local and family custom rather than a single panchang-mandated procedure. Readers looking for a formal sequence of worship should follow the practice of their own household or region, and may consult a qualified jyotishi or family priest where a specific procedure is wanted.

What can be stated from the brief without addition is the timing: the observance is tied to the solar ingress into Mesha, and the day is reckoned as Bohag 1 in the Assamese calendar.

Regional Variations

Bohag Bihu is observed in Assam. Within that broad setting, the day is the Assamese new year, and the reckoning follows the solar ingress into Mesha as described above.

Two kinds of variation are commonly met with in festival observance generally, and they apply here as well.

• By place. Since the observance depends on the sunrise of a location, the civil date can differ by a day between cities. The dates given on this page are for New Delhi sunrise with Lahiri ayanamsha.
• By calendar convention. Amanta and purnimanta reckonings can produce different listings for the same festival. Where such differences appear, they reflect the convention in use rather than a disagreement about the solar ingress itself.

Beyond this, the brief does not record separate regional rites, so nothing further is asserted here. Families and communities in Assam follow their own inherited customs for the new year, and those customs are best learned from the household or region concerned.

What to Avoid

A few cautions keep the observance clear of claims the panchang does not make.

• Do not treat the date as fixed across all locations. The day is reckoned from the solar ingress at a place, so a neighbouring city may observe it on a different civil date. Check the date for your own location.
• Do not confuse the basis of the date. Bohag Bihu is fixed by the Sun's entry into Mesha, not by a tithi or nakshatra. Comparing it with lunar festivals on tithi grounds will produce apparent mismatches that are not errors.
• Do not expect a single prescribed vidhi. The brief records no deity and no set procedure; follow family or regional custom rather than a claim of one universal method.
• Do not read personal outcomes into the festival. Bohag Bihu is a new year observance. It is not a predictive instrument, and no result concerning health, money, marriage or legal matters should be drawn from it.

For anything specific to an individual chart, the appropriate course is to consult a qualified jyotishi rather than to extend the festival date into personal prediction.