THEY’RE almost as rare as hen’s teeth, but a blue moon will shine over Oxfordshire tonight.

Contrary to its name, a blue moon is not blue – it is just the name given to the second full moon in any calendar month.

Nonetheless Oxford Castle is taking advantage of the unusual astronomical event by tonight hosting an outdoor screening of cult classic An American Werewolf in London, under the full moon.

Cinema lovers will lounge in deck chairs and bean bags to watch the spooky flick by the light of the moon from 7.30pm.

Tickets available from cultscreens.co.uk