Santa's sleigh should not be hard to spot flying through the sky on this upcoming Christmas day.

For the first time since 1977, the moon will be completing its cycle, coming in to its fullest on Christmas day -it's been thirty-eight years since the moon has been full on the day of festivus.

Get up early enough and you'll be able to see it at its absolute fullest at 6:11am on Christmas day.

It is rare enough for a full moon to fall on Christmas, but it is even more rare for the moon to come to its absolute fullest on any given day- especially Christmas day.

The U.S. Navy Astronomical Applications Department's moon phases predictor is calculating the next full moon on Christmas to occur at 3:54 a.m in the year 2034.

The full moon on Christmas should look magical, and will be worth getting up extra early on Christmas morning if the sky is clear.

For more information on moon calculations, visit the Astronomical Applications website at: http://aa.usno.navy.mil/data/docs/MoonPhase.php