Spring Equinox 2024 Southern Hemisphere. According to the astronomical definition of the seasons, the vernal equinox also marks the beginning of spring, which lasts until the summer solstice (june 20 or 21 in the northern. After the spring equinox, the north pole continues tilting toward the sun until summer solstice, or the day when the northern hemisphere receives the most sunlight.

When do the four seasons start in 2024—for spring, summer, fall, and winter? Here are the equinox and solstice dates—plus, answers to common questions about the seasons of the year in north america.