Winter Start Date 2024. The winter solstice marks the official start of the astronomical winter, as the sun reaches its most southerly point in the sky as seen from earth. Winter solstice marks the start of winter in the northern hemisphere with the shortest day and longest night.(pixabay) winter solstice 2024 date and time this year, winter solstice will occur on.

This year the winter solstice in the northern hemisphere is on 21 december and therefore our astronomical winter begins on that date. The solstice occurs at the same time everywhere on earth, this year it happens dec.