Actually, your last line can only be true for mean solar time. The sun leads or lags mean solar time, by a varying amount described by the misleadingly-named Eq

Actually, your last line can only be true for mean solar time. The sun leads or lags mean solar time, by a varying amount described by the misleadingly-named Equation of Time. https://en.m.wikipedia.org/wiki/Solar_time#Apparent_solar_time https://en.m.wikipedia.org/wiki/Solar_time#Apparent_solar_ti... (The annual variation is due to two main factors: the tilt of the Earth and the eccentricity of the Earth's orbit. I got asked about this in a programming interview once and couldn't remember! Never again.)