Santa Claus is coming to Irish shores.
Millions of children have been counting down the days of December until he makes his way around the world.
Christmas Eve is a busy time for Santa, as he needs to visit 390,000 homes per minute - or 6,424 per second.
But he won't be short of energy: during his journey, he'll consume a total of 71,764,000,000 calories - whether its milk, mince pies or gingerbread men.
And don't forget some water and carrots for Rudolph and the rest of the reindeer.
People can track Santa thanks to The North American Aerospace Defence Command, NORAD.
Its 'Santa Cams' will stream videos on the website as Santa makes his way over various locations.
It all started in 1955, when a local media advertisement asked children to call Santa direct - only the number was misprinted.
Instead of reaching Santa, the phone rang through to the crew commander on duty at the Continental Air Defence Command Operations Centre.
NORAD prepares to track Santa | Image: NORAD
And so began the tradition, which NORAD carried on since it was created in 1958.
Since 1955, it has used satellites, high-powered radar, jet fighters and its special Santa cameras to track Santa Claus as he makes his journey around the world.
Santa Claus is known by many names, including Saint Nick.
Historians claim that the history of Santa starts with the tradition of Saint Nicholas, a fourth century Christian priest who lived in the Middle East and became famous for his kindness.
He was known for giving gifts to the less fortunate, sprinkling gifts of gold down people's chimneys, and for hiding surprises in their stockings.
Santa keeps a long list of children who have been good throughout the year.
His list grows longer each year due to the world's increasing population.
Though his list gets longer, Santa still has to deliver all of the presents in the same amount of time.
But Santa would never rush such an important job.
It is thought Santa could exist in a different time-space continuum than the rest of us, so he can get all his work done in one night.
Santa is a true mystery to us all...
But to make sure he gets to you, you better be in bed early tonight!
You can follow Santa's journey here
