Age of Aquarius: When Does It Begin? Which Age Are We In?

It depends on what the equinox point is measured against, and neither of the two reckonings worked out here puts the start in 2026. Against the constellation borders of the International Astronomical Union, the March equinox point will cross from Pisces into Aquarius in 2597, 571 years from now. Against the sidereal signs of the Lahiri ayanamsa, the zodiac every chart on this site uses, it will leave sidereal Pisces in about 2439. So by both counts the answer to “which age are we in” is the Age of Pisces, and the two disagree about its end by 158 years.

The page shows where each year comes from, why the constellation ages come out unequal, what the often quoted figure of about 2,160 years per age rests on, and the spread of start dates astrologers have published.

What Moves: The March Equinox Point

The en-Wikipedia article on astrological ages gives the usual definition: an age is named after the constellation, or the superimposed sidereal sign, in which the Sun appears at the vernal (March) equinox. The Sun stands at the equinox point at that moment each year, so the question is where that point lies among the stars. Precession of the Earth’s axis carries it slowly backwards through the zodiac, about one degree in 72 years by the Lahiri formula’s rate for 2026. Backwards is why the Age of Aquarius follows the Age of Pisces, the reverse of the order of the signs.

A tropical zodiac cannot date an age at all. Western astrology’s tropical signs are counted from the equinox point itself: 0° tropical Aries is defined as the place the Sun reaches at the March equinox. Measured in that zodiac the point never leaves 0° Aries, in any century. To see it move, one needs a frame tied to the stars, either the constellations or a sidereal zodiac such as the Lahiri one. The ayanamsa page sets out that gap between the two zodiacs, 24°13′ on 1 January 2026.

An astrological age is also a different count from the yugas of the Puranas. Those are fixed spans of years with no link to the equinox point; a mahayuga, as the yuga and kalpa page works it out, is 4,320,000 years, more than a hundred whole precession cycles.

Reckoning One: The IAU Constellation Borders

The constellation borders adopted by the IAU, published in Eugène Delporte’s 1930 tables for the Union, give every point of the sky to exactly one constellation. The site’s generator takes the direction of the true equinox of each year, using the IAU 2006 precession model in the Skyfield library, and asks which constellation it lies in, year by year from 201 BCE to 2800. It finds two changes:

• Aries to Pisces in 68 BCE (astronomical year -67, since that count has a year 0)
• Pisces to Aquarius in 2597

That makes the Age of Pisces by the constellation borders 2,664 years long. Because astronomical numbering includes a year 0, the plain difference between the two years is the count; with BCE and AD dates one year would have to be taken off. The point has about 8 degrees of precession still to cover before it reaches the Aquarius border.

The en-Wikipedia article on the Age of Aquarius, citing Sepp Rothwangl, gives 2595 AD as the year the IAU border places the start. The computed year here is 2 years later. The article does not give Rothwangl’s method, so this page cannot say which choice separates them; a different moment within the year, or a different precession model, is enough, because 2 years of precession move the point by only 1.7′ of arc, under a thirtieth of a degree. The two figures agree on the century.

Reckoning Two: The Lahiri Sidereal Signs

In the sidereal zodiac the equinox point sits at 360° minus the ayanamsa. When the ayanamsa was 0° the two zodiacs coincided and the point stood at the border of sidereal Aries and Pisces; when it reaches 30° the point will stand at the border of sidereal Pisces and Aquarius. Solving the site’s Lahiri formula for those two values gives:

By this count the Age of Pisces runs about 2,154 years, and the Aquarius line lies about 413 years ahead. In 2026 the point stands at 5°47′ of sidereal Pisces with 5°47′ still to go. Those two figures are the same number because the point moves backwards: its degree within Pisces is exactly its distance from the start of the sign, which is where Aquarius begins.

The years in this table are this page’s extrapolation. The Lahiri expression is a quadratic in time measured from the year 2000, and here it is carried about 17 centuries back and 4 forward, far beyond the modern positions it is used for. That is why the table says “about”.

Why the Constellation Ages Are Unequal

Sidereal signs are all 30° wide; constellations are not. The widths below are measured along the 2027 ecliptic, from the sidereal longitudes at which the Sun crosses each IAU border in the site’s DE421 data, the same crossings the Ophiuchus and Sun constellation dates page is built on. They are listed in the order the equinox point meets them. The last column only divides each width by the 2026 rate of 50.30″ a year; the rate changes over millennia, so the further rows are rough.

Pisces, at 37.0°, is wider than a sign, and Aquarius, at 24.2°, is narrower, so a constellation Age of Aquarius would be shorter than the Pisces one before it. Ophiuchus lies on the path as well, which means the constellation reckoning has an Ophiuchus age many millennia ahead, one that no sign-based scheme contains.

Two independent measures check each other here. The Lahiri formula’s precession between the two IAU crossing years is 37.09°, and the DE421 width of Pisces is 37.03°: a difference of 0.06°. The Pisces width at today’s rate gives about 2,650 years, fewer than the computed 2,664, because precession was a little slower in the centuries behind us.

The Equal-Sign Arithmetic: How Long One Age Lasts

If every age is one 30° sign, its length is 30° divided by the rate of precession. At 50.30″ a year that is 2,147 years for one age and 25,767 years for the full 360°. en-Wikipedia’s Age of Aquarius article gives 25,772 years and 2,147.5 years per age, assuming a constant rate; the computed cycle is within 5 years of its figure. The 2,160 years that circulates widely is, in the same article’s account, the astrologers’ round figure from a 25,920-year great year divided by twelve.

The Lahiri age of Pisces worked out above, about 2,154 years, is a few years longer than 2,147 for the same reason as before: the formula’s rate was slightly lower over the earlier part of the span.

Start Dates Astrologers Have Proposed

The published dates spread over more than two thousand years. The en-Wikipedia article on the Age of Aquarius, drawing on Nicholas Campion’s The Book of World Horoscopes (1999), reports proposals from 1447 AD (Terry MacKinnell) to 3597 AD (John Addey). By its summary of Campion, the 20th century draws the most claims, 29, and the 24th century is second with 12. The 18th, 19th and 20th centuries together account for 38 of the claims the article counts, so a good share of the published dates already lie in the past. The article also notes that astrologers do not agree on whether it has started.

The two years computed on this page fall in the 25th century (Lahiri, about 2439), which has 8 claims in that tally, and the 26th century (IAU borders, 2597), which has 7. en-Wikipedia’s article on astrological ages also describes a convention of ages exactly 2,000 years long, with Pisces from AD 1 to AD 2000, and notes that it does not follow precession.

What This Page Does Not Give

Much of what is written about the Aquarian age concerns what it is supposed to bring. None of that is here: no character of an age, nothing it holds for a person, a country or the world. A boundary crossing is a matter of geometry, and the geometry has nothing to say about events, so the page stops at the dates and how they are reached.

In Brief

• Which age now: Pisces, by the IAU borders and by the Lahiri signs alike
• IAU borders: Pisces from 68 BCE to 2597, 2,664 years; en-Wikipedia, citing Rothwangl, gives 2595
• Lahiri signs: Pisces from about AD 285 to about 2439, roughly 2,154 years, extrapolated
• In 2026: the equinox point is at sidereal Pisces 5°47′, 5°47′ from Aquarius
• One equal age: about 2,147 years at today’s rate; full cycle about 25,767
• Tropical zodiac: cannot date an age, since its 0° Aries is the equinox point by definition

The fixed stars page gives the tropical and Lahiri longitudes of bright stars for 2026 and how far each moves in a century, the same drift seen star by star. The Vedic Sun sign dates page shows what the gap between the zodiacs does to the Sun: the dates on which it enters each sidereal sign, beside the western ones.