Members of The Druid Order celebrated the autumn equinox today with a service to mark the arrival of the harvest.
The group descended upon Primrose Hill, north west London, near Chalk Farm Tube station, to hold their traditional annual ceremony - which dates back to 1717.
Dressed in their traditional white robes, the procession of druids head towards the top of the hill before forming into a circle and performing the ancient ceremony.
The autumn equinox, which normally occurs between September 22 and 24, is a brief event when the sun appears to shine directly over the equator, and daytime and nighttime are nearly equal lengths all around the world.
Members of The Druid Order arrived to Primrose Hill, north west London, near Chalk Farm Tube station, earlier today to hold their traditional annual ceremony
The group, who were dressed in their traditional white robes, formed a procession line and walked towards the top of Primrose Hill
The autumn equinox is a brief event when the sun appears to shine directly over the equator, and daytime and nighttime are nearly equal lengths all around the world
The Earth is tilted on its axis, meaning that as the planet orbits the Sun, the Sun illuminates the northern or southern hemisphere more depending on where the Earth is along its orbit.
However, at two points in the year the Sun will illuminate the northern and southern hemispheres equally. These are known as the equinoxes.
Members of the Druid Order believe this time to be the 'start of the Druid year, when day and night are equal'.
On the day of the equinox the Earth's axis is perpendicular to the sun's rays.
After the autumn equinox, the Northern Hemisphere starts seeing fewer hours of daylight than darkness each day.
A statement on the group's website read: 'This is the start of the Druid year, when day and night are equal. The harvest
