Ready for the first day of spring? What we know about the 2025 spring equinox, the autumnal equinox, summer and winter ...

This is the shortest day of the year, and it means it has the fewest hours of daylight. The summer solstice happens when the angle of tilt towards the sun is at its greatest, and so we have the ...

Anyone north of that imaginary line during northern summer has a direct line of sight to the Sun 24 hours a day. Solstices and equinoxes track precise astronomical moments. Each solstice is when ...