The Boston Globe
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The autumnal equinox marks the start of astronomical fall, occurring on September 22 when daylight and night are roughly equal. Despite the certainty of its date, the actual equalization of daylight and darkness, known as the equilux, happens a few days later due to atmospheric effects and the sun’s physical characteristics. Research indicates that the rapid decrease in daylight during this period can impact mood and mental health, with studies showing that the rate of sunlight decline influences symptoms of depression. Experts suggest that getting exposure to morning light, especially around sunrise, can help regulate circadian rhythms and potentially improve well-being during this seasonal transition.
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