Not only that "noon" isn't necessarily when the sun is above your head as we have timezones, but solar noon isn't at the same point in the day throughout the ye

Not only that "noon" isn't necessarily when the sun is above your head as we have timezones, but solar noon isn't at the same point in the day throughout the year. You could be dead center in the time zone but the sun will be up to 16 minutes ahead or behind your time depending on the date. For more - https://en.wikipedia.org/wiki/Equation_of_time https://en.wikipedia.org/wiki/Equation_of_time