03/20/2026
The Spring Equinox marks one of the great turning points of the year
For a brief moment, day and night are held in equal measure before the light begins to grow stronger again. Across cultures this moment has long been recognized as a threshold, when the inward movement of winter begins to shift toward the outward movement of spring.
This turning is not only symbolic. It is biological.
Human physiology is deeply responsive to light. As the days lengthen in early spring, increasing light enters through the eyes and signals the brain’s circadian center that the seasonal cycle is changing. These signals influence many systems in the body including sleep rhythms, hormones, metabolism, mood, immune function, and reproductive cycles.
The body is continuously receiving information from the environment and adjusting its internal rhythms in response.
In winter, longer nights encourage deeper rest and inwardness. As spring approaches, increasing light begins to reorganize these rhythms. Many people notice that energy begins to rise, sleep patterns shift, and there is a natural impulse to move, clear, and begin again.
Seasonal cultures have long recognized this moment as an opportunity to pause and consciously orient toward the cycle that is beginning.
The equinox invites reflection. What has completed during the winter months. What is ready to be released. What seeds are ready to be planted in the months ahead.
This moment of balance offers a quiet opportunity to realign with the rhythms of the Earth and the returning light.
References
Roenneberg T., et al. “Seasonal variation in human circadian rhythms.” npj Digital Medicine. 2021
Wehr T. “Photoperiodism in humans.” Journal of Biological Rhythms
Cleveland Clinic. Circadian rhythms and light exposure
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