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Spring equinox: is the beginning of spring (vernal equinox). It occurs on March 20 or 21 in the Northern Hemisphere. Summer solstice: is the beginning of summer. It occurs on June 21 or 22 in the Northern Hemisphere. Autumnal equinox: is the beginning of autumn (autumnal equinox). It occurs on Sept. 22 or 23 in the Northern Hemisphere. Winter solstice: is the beginning of winter. It occurs on on Dec. 21 or 22 in the Northern Hemisphere. |