Overview

• The spring equinox officially began on March 20, 2025, at 5:01 a.m. EDT, aligning Earth's axis and orbit to create equal day and night durations globally.
• This event marks the start of astronomical spring in the Northern Hemisphere and autumn in the Southern Hemisphere.
• Cultural traditions like Nowruz, the Iranian New Year, and gatherings at Chichen Itza in Mexico highlight the equinox's historical and global significance.
• Longer daylight hours and increasing sunlight in the Northern Hemisphere will continue to expand until the summer solstice on June 20, 2025.
• Astronomical seasons are determined by Earth's position relative to the sun, distinct from meteorological seasons based on temperature cycles.