Sunday is the summer solstice, the moment when the Northern Hemisphere experiences its longest day and shortest night of the year. The solstice marks the point in Earth’s orbit when the planet’s axial tilt places the Northern Hemisphere most directly toward the Sun. As a result, daylight lasts longer across many countries in the north, while the Southern Hemisphere reaches its opposite seasonal midpoint, with shorter days at the same time. The summer solstice also signals the start of astronomical summer in the Northern Hemisphere. The timing is widely observed as a calendar and astronomical milestone, with the exact length of the day varying by location due to differences in latitude. The event is therefore both a consistent global astronomical occurrence and a locally experienced change in sunrise and sunset times. Across the half of Earth’s surface aligned with the Northern Hemisphere, Sunday represents peak daylight for the year before days gradually shorten afterward.