Equinoxes And Solstices Uk 2025. The solstices and equinoxes and the seasons that we experience exist because the axis of rotation of the earth is at an angle of 23.4 degrees to the vertical axis. It marks the northern hemisphere’s shortest day (first day of winter) and southern hemisphere’s longest.

The 2025 december solstice takes place on december 21, at 9:21 utc. Visualize the current position of the sun relative to the seasons with the astro clock, a.