The summer solstice in the Northern Hemisphere will occur on June 20, 2024, while in the Southern Hemisphere, it will happen on December 21, 2024. This event marks the commencement of astronomical summer and the year's longest day. It happens when one of the Earth's poles has its maximum tilt toward the sun, an occurrence that takes place twice annually. In June, the Northern Hemisphere celebrates the summer solstice, coinciding with the winter solstice in the Southern Hemisphere, and vice versa in December. Cultures worldwide celebrate the summer solstice and the longest day with various traditions, holidays, and festivals, offering a spirited farewell to the winter season.