If you don't look up to the sky tonight, you will have to wait more than 40 years to see a natural phenomenon known as a Strawberry Moon.

Monday, June 20 is the longest day of the year and for the bright full moon and the summer solstice to fall on the same day is a once in a lifetime occurence.

Tonight is the first time this has happened since 1967 and the next time you will witness it is in 2062.

Every year the summer solstice, with the longest period of sunshine, takes place between June 20- 22.

The longest day of the year started when the sun rose at 4.45am this morning with the sun due to set at 10.34pm tonight.

The term 'Strawberry Moon' comes from Native Americans who coined the phrase to mark the beginning of the strawberry season.

Despite the name, the moon will not appear red or pink, it will be a bright full moon that creates a warm glow.

Hopefully, cloud cover tonight will not get in the way of people catching a glimpse of the rare lunar event.

If you catch a glimpse of the Strawberry Moon we'd love to see your photos, tweet us @ChesterChron or upload to our Facebook page .