Calculateur de Midi Solaire — Formule
## Solar Noon
Solar noon is when the Sun crosses your local meridian (highest point in the sky). It differs from clock noon because your longitude may not match your time zone's standard meridian.
### Formula
**Offset = (Standard Meridian - Your Longitude) × 4 minutes**
Each degree of longitude corresponds to 4 minutes of solar time (360° / 24 hours = 15°/hour).
The equation of time (up to ±16 min seasonal variation) is not included here.
Solar noon is when the Sun crosses your local meridian (highest point in the sky). It differs from clock noon because your longitude may not match your time zone's standard meridian.
### Formula
**Offset = (Standard Meridian - Your Longitude) × 4 minutes**
Each degree of longitude corresponds to 4 minutes of solar time (360° / 24 hours = 15°/hour).
The equation of time (up to ±16 min seasonal variation) is not included here.
Exemple Résolu
New York City: longitude -73.97°, Eastern time zone meridian -75°.
- Offset = (-75 - (-73.97)) × 4 = -1.03 × 4 = -4.12 min
- Solar noon ≈ 12:00 - 4.12 min = 11:55:53
- The Sun is highest about 4 minutes before clock noon.