First Day Of Summer 2024 Uk Calendar. What exactly is the summer solstice? In 2025 the winter solstice will occur on sunday 21 december at 15.03 gmt.
The summer solstice is the first day of astronomical summer, although the more logical metrological summer begins december 1st / june 1st (depending on hemisphere). Autumn begins on september 22 or 23 and ends on december 21 or.