Question

what is meant by local noon time?

Answer 1

Local noon is defined as the time when the Sun undergoes an upper meridian transit, crossing the imaginary great circle on the celestial sphere that joins the celestial poles and the observers' zenith. ... An apparent solar day is the length of timebetween two successive local noons.

Answer 2

Local noon is defined as the time when the Sun undergoes an upper meridian transit, crossing the imaginary great circle on the celestial sphere that joins the celestial poles and the observers' zenith.

The local time of a place is decided with the help of noon time. It is because the noon timeis the daytime when the sun rays are at their highest position. Also, the local time at greenwich is considered to be the international standard time.