Hundreds of people are expected to mark the spring equinox at Jersey's ancient La Hougue Bie burial site.
Special events will take place on Sunday
Depending on the weather conditions the sun can shine through the ancient burial passage.
The spring or vernal equinox is the time of year when there are exactly 12 of sunshine and of darkness. The autumn equinox takes place in September.
Neolithic man in Jersey built the burial site at La Hougue Bie to link in with the equinox.
As the sun rises a beam of light can shine right through to the back wall of the burial passage.
The change of season was very important to the Neolithic farmers and the design may also be a link to their ancestors buried inside La Hougue Bie.
Special events are taking place on Sunday to teach young people about the seasons and how to use sun dials.
People are able to go to La Hougue Bie in time for sunrise over the next three or four days if they want to see the sun shining through the burial site.