What is GMT?

GMT stands for Greenwich Mean Time, and it’s like a special clock that helps people all over the world know what time it is in different places.

Imagine you have a big, friendly friend who lives on the other side of the world. You want to play a game at the same time, but your clocks don’t match because you’re so far apart. That’s where GMT comes in, it helps everyone agree on a common time, like a shared language for hours and minutes.

Think of the Earth as a giant pizza that spins around once every day. GMT is based on a special line called the Prime Meridian, which runs through Greenwich, England. When the sun is directly above that line, it’s 12:00 noon in Greenwich, and that’s when GMT says it’s 12:00.

Other places on Earth use this time as a starting point to figure out their own local times. So if you're somewhere else on the pizza, your clock might be ahead or behind depending on how many slices of Earth you’re away from Greenwich!

GMT is like a shared timer that helps everyone play together, no matter where they are!