Santa and his reindeer, which are sometimes mixed up with the International Space Station (ISS), will be passing over Ireland for a few minutes on Christmas Eve.

Both Astronomy Ireland and NASA are predicting that he will make his appearance at from 5.21pm tomorrow evening and he will be visible for four minutes.

He will fly overhead again at 6.57pm for just two minutes.

Santa's huge sleigh and his reindeer friends will be very high up in the sky so they will look like a star but thanks to Santa's magic it will shine so much that it will be brighter than the other stars in the sky.

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He will fly very quickly from the southwest to the south east, following the path of the International Space Station (which can be tracked here), as he prepares to deliver his gifts around the country.

Not sure what to look out for? It should look something like this:

"The night of Christmas Eve into Christmas Day will be cold with clear spells," Met Éireann predicts, so Santa will have good weather for travelling and we should be able to see him pass overhead clearly.

The Christmas Eve flyover won't be the first sighting of Santa in Irish skies this week. Some eagle-eyed people in Cork saw him scouting near Shandon yesterday.

So on Christmas Eve, follow these steps:

1. Wrap up warmly

2. Go outside around 5.15 (in case Santa gets an early start)

3. Try to watch for Santa from somewhere with few streetlights or you might not be able to see clearly

4. Look towards the south-west horizon

5. Watch out for what looks like a star rising up from the horizon after a few minutes - that's Santa!

6. As it arcs to the right it will get brighter and higher before dropping down below the horizon, out of sight

BONUS STEP: Get out tonight and make sure you know where to spot him tomorrow. The ISS will be over Ireland at 6.12pm and 7.48pm - since Santa follows the same route as the ISS you'll know where to look tomorrow night to see the man himself.

Don't forget to wave!

Click here and NASA will tell you when Santa is expected to pass near you