Those having a beer at Sloppy Joe's Bar in Havana Cuba today, will be hoping they wake up tomorrow remembering their time there.

For above the newly-refurbished and somewhat iconic bar, high in the sky occurred an atmospheric phenomenon known as a 'sun dog'.

The sun was surrounded by a bright ring, caused by a refraction of sunlight by small ice crystal in the atmosphere.
Bright spark: An atmospheric phenomenon known as a 'sun dog' is seen in the sky over Sloppy Joe's Bar, Havana, Cuba
Put down your pint: The rare halo around the sun is caused by the refraction of sunlight by small ice crystals in the atmosphere

The 'sun dogs' are red in shape, and they number around the outside of the sun, joined together by a white circle that is often labelled a 'Mock Sun'.

This event normally occurs when the sun is low, although it can happen at other times of the day, but the 'dogs' will be less striking and probably not as bright.

It is the crystals that refract the sun's light at an angle of 22 degrees. However as the crystals lower and disperse, they become vertically aligned, striking the light horizontally, and this is how the sun dogs are formed.

The famous old-town saloon bar, once frequented by the likes of John Wayne, Spencer Tracy and Clark Gable, has only just reopened after 50 years.

And the new owners will be hoping the fantastic spectacle seen above the bar will be a sign of good things to come.

Sun dogs are visible all over the world and at any time of year regardless of the ground level temperature.

In Europe and North America one will be seen on average twice a week if searched for.