Sun in Sidereal Sagittarius: December 16, 2026 – January 14, 2027 (2026)

The Sun is in sidereal Sagittarius from December 16, 2026 to January 14, 2027 in 2026, calculated with the Lahiri ayanamsa. The window crosses the December–January calendar boundary: the Sun enters Sagittarius in mid-December and exits in mid-January. Most tropical Capricorns born December 22 – January 13 carry a sidereal Sagittarius Sun — the mutable fire philosopher rather than the cardinal earth strategist.

Why these dates differ from tropical astrology

Tropical astrology begins Sagittarius at the November 22 Scorpio-Sagittarius cusp, counted from the vernal equinox. Sidereal astrology begins it when the Sun reaches the Sagittarius star pattern — roughly December 16. The ~24.21° discrepancy equals Earth's accumulated precession since the systems aligned in ~285 CE: approximately 1,740 years × 50.3 arcseconds per year. The Lahiri ayanamsa, India's official standard since 1955, subtracts this accumulated drift from tropical longitudes at every calculation. Astronomers confirm this independently: the Sun physically enters the Sagittarius star region in mid-December, not late November. The practical result is dramatic — most tropical Capricorns born December 22 through January 13 are sidereal Sagittarius by Lahiri calculation, the mutable fire philosopher rather than the cardinal earth strategist.

Why sidereal differs from tropical →

How dates shift year over year

Because Sagittarius straddles December and January, the seven-year table below lists entries in mid-December of the given year and exits in mid-January of the following year. In 2026 that means entry around December 16, exit around January 14, 2027. The ingress shifts roughly 20 minutes later per decade, computed via Swiss Ephemeris with SEFLG_MOSEPH and Lahiri ayanamsa. The data for 2023–2029 is especially useful for anyone born near December 15–17 or January 12–15, where the sidereal boundary separates Scorpio from Sagittarius and Sagittarius from Capricorn — two very different solar sign interpretations.

See also

• Sun in Sagittarius — personality and traits
• Why sidereal differs from tropical
• Calculate your full birth chart

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