Aquarius is the Water-Bearer, a figure pouring a stream that runs south to the mouth of the Southern Fish. It is a large, dim constellation; its brightest star, Sadalsuud, is not quite third magnitude. The Sun is in it from the second half of February into March. The horoscope’s Aquarius starts a month earlier, because the horoscope keeps time by the equinox and the equinox has moved.
The dates above are computed for 2026 from the constellation boundaries the International Astronomical Union fixed in 1930. They move by about a day every seventy years, so they are good for a lifetime, and for the particular day you were born the calculator will check the boundary itself.
