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Sun at Christmas · 4°20′ Capricorn
4°20′
Annual tropical Sun return to 4°20′ Capricorn · near Christmas Day (often 25 Dec, sometimes 26th by the hour)
Every December the Sun returns to 4°20′ Capricorn. Feast day and solar longitude share a calendar. No one had to plan the overlap.
What it supports
A tropical-year appointment. In the Austin frame the exact minute drifts: 25 Dec most years, occasionally 26 Dec before dawn. Swiss / AstroSeek will re-run any year.
What it does not
Not a sealed nativity. Not the integer 42. Not 420. Not proof the feast was timed to the degree. Elon’s KCRW whistle is a neighbor on the plate, not the coordinate.
Calculation
Sun λ = 274°20′ (4°20′ Capricorn) once per tropical year
Tropical ecliptic. Civil date drifts with time zone; Austin frame: 25 Dec most years.
ExactnessCoordinate
Form4°20′
Unit° ′
Strengthreproducible