The Southern Hemisphere Is in Spring While We Just Hit the Autumn Equinox: The Boundary Between Solar Terms and the Month Order
In 2026 the Autumn Equinox falls at 08:04:56 on 23 September (about 08:05, China Standard Time), and at that same instant the calendar in Brazil reads 21:05 on 22 September — the minute spring begins in the southern hemisphere. This article is about the range over which solar terms and the month order apply: why one and the same calendar feels out of season in two hemispheres, and the three things anyone born in the southern hemisphere should confirm before casting a chart.