2025 Shortest Day Of The Year. In 2025, the solstice moment will fall at 2:42 utc on june 21 (9:42 p.m. The shortest day of the year — the winter solstice — is saturday, dec.
According to the astronomical calendar, december 21 marks the shortest day of the year and official start of winter in the uk The shortest day and the longest night of the year in the northern hemisphere occur during winter solstice which is usually observed on december 21st or sometimes on december 22nd utc (see table.