A RARE celestial phenomenon will take place this Halloween as a Blue Moon is set to rise.

The cosmic display happens seven times every 19 years and their rarity inspired the phrase, “once in a blue moon”.

The world will not see the next Blue Moon on October 31 until 2039.

What makes this Blue Moon extra special, it that it is the first one to be seen in all parts of the world since World War II.

But the phenomenon itself is slightly less exciting and the moon is unlikely to look blue unless the atmosphere is filled with dust or smoke particles from a volcanic eruption. 

Rather than the moon actually changing colour, a blue moon refers to when two full moons appear in the same calendar month.

We saw a Harvest Moon on October 1 which, means Halloween’s moon is classified as a blue moon.

Whilst you might it may be disappointing that the moon will not shine blue it does create the perfect backdrop for Halloween werewolf costumes.

When is the best time to see the Blue Moon?

The Blue Moon this year will rise at exactly 16:53 on Saturday, October 31st.

But the moon will look bright and impressive all night so don’t worry if you miss it rising.

You’ll be able to see the moon in full from anywhere on Earth, as long as the sky isn’t cloudy.

When are the remaining full moons in 2020?

October 31 - Blue moon

November 30 - Beaver moon

December 29 - Cold moon