天文冬天始于2025年12月21日,是北半球一年中最短的一天。 Astronomical winter began on December 21, 2025, with the winter solstice, the shortest day of the year in the Northern Hemisphere.

天文冬季始于2025年12月21日,其标志是冬季休眠和北半球一年中最短的一天。 Astronomical winter began on December 21, 2025, marked by the winter solstice and the shortest day of the year in the Northern Hemisphere. 南卡罗来纳州等一些地区的气温异常寒冷,气温比平均气温低5至10摄氏度,但圣诞节时,气温可能达到60和70摄氏度,预计会向更温暖的环境转变。 While some regions like South Carolina experienced unusually cold temperatures, with highs 5 to 10 degrees below average, a shift toward warmer conditions is expected by Christmas, with temperatures potentially reaching the 60s and 70s. 尽管目前寒冷,但宁静后的日光将迅速增加,持续到春天。 Despite the current chill, daylight will increase rapidly after the solstice, continuing through spring. 其产物是地球23.5度的轴向倾斜,导致太阳出现在其最低的正午角。 The solstice results from Earth’s 23.5-degree axial tilt, which causes the sun to appear at its lowest noon angle. 这个日子的意义可追溯到古代文化, 时机可能影响到12月25日圣诞节的选择。 The date’s significance dates back to ancient cultures, and its timing may have influenced the choice of December 25 for Christmas.