By the horoscope, yes, and your sign stays yours. The stars behind it have quietly moved along, though: Gemini runs from 21 May to 20 June 2026, and on those dates the Sun is in Taurus throughout. This is the sky behind your sign.
Taurus, where the Sun spends all of Gemini’s 31 days, engraved in the old atlas style with its real stars traced over the figure.
Gemini’s dates were set more than two thousand years ago, pinned to the March equinox, when the signs took their names from the constellations the Sun was crossing. Since then Earth’s slow wobble, called precession, has carried the equinox about a twelfth of the way round the sky, roughly one day’s worth every seventy years. Your sign has kept its dates, and the stars behind them have simply moved along: that is why the Sun now spends Gemini’s days in Taurus.
These dates are computed for 2026 from the constellation boundaries the International Astronomical Union fixed in 1930. A boundary can fall a day earlier or later in another year, so for the particular day, and hour, you were born the calculator will check it for you.
