WATCH: Coca-Cola’s Nostalgia-Inducing Christmas Ad Is Back

For some people, the first sign of Christmas is the big red Coca-Cola Christmas truck.

And it's officially back having appeared last night on televisions around the world once again.

This ad turns 21-years-old (!!!) this Christmas but it's as timeless and classic as ever – it gives us the warm and fuzzies every time.

When Coke tried to replace the ad in 2007 people lost their shit, fans were distraught and Christmas was ruined. So they brought back it back a few weeks later.

If it ain't broke, don't fix it.