Spring equinox 2026 marks astronomical point of equilibrium

The spring equinox of 2026 is set to occur in the Northern Hemisphere on Friday, March 20. This astronomical event marks a moment of geometric symmetry where the Earth's rotational axis is perpendicular to the Sun's rays.

During this period, day and night last approximately 12 hours each across the globe. The Sun is expected to position itself directly over the celestial equator at 15:46 hours, ensuring both hemispheres receive equal amounts of light energy.

Beyond the astronomical mechanics, the shift in natural light levels can influence human biology. The increase in daylight hours is linked to changes in hormone production, specifically affecting serotonin and melatonin levels.