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When is the vernal equinox?

The vernal equinox occurs on March 20 or 21 in the Northern Hemisphere or September 22 or 23 in the Southern Hemisphere. In 2026 the Northern Hemisphere vernal equinox happens on March 20 at 14:46 Universal Time (UT), and the Southern Hemisphere vernal equinox occurs on September 23 at 00:05 UT.