Decamber 21
The December solstice, which is the winter solstice in the northern hemisphere marks the beginning of northern winter.
In the northern hemisphere it is the winter solstice that marks the start of winter.
The winter solstice, which occurs around December 21st, marks the official beginning of winter in the Northern Hemisphere. It is the shortest day of the year with the longest night, after which the days start to gradually get longer.
No season begins in November. Winter begin on December 22.
vernal
The month with the shortest days is December in the Northern Hemisphere, as it marks the beginning of winter and has the winter solstice, which is the shortest day of the year. In the Southern Hemisphere, June has the shortest days for the same reason.
In the Northern Hemisphere, June is summer, but in the Southern Hemisphere, June is winter.
The winter solstice marks the shortest day of the year and the official start of winter in the Northern Hemisphere. It is the point at which the sun's rays are farthest from the equator and daylight hours are at their shortest.
The solstices are points on the 'map' of the stars, representing the sun's apparent farthest north and farthest south excursions in the course of a year. The observer's location on Earth has no effect on when the sun reaches those points. One is on or about June 21, the other is on or about December 21. The June solstice marks the beginning of astronomical Summer in the northern hemisphere, and Winter in the southern one. The December solstice marks the beginning of astronomical Summer in the southern hemisphere, and Winter in the northern one.
In the southern hemisphere, June is Winter.
The spring equinox marks the beginning of spring. This is a date where night and day are exactly equal. In the northern hemisphere, this day falls on or around March 21st. In the southern hemisphere, this day falls on or around September 21st.
In the southern hemisphere, September 1st marks the beginning of spring because the seasons are opposite to those in the northern hemisphere due to the tilt of the Earth on its axis. This means that while the northern hemisphere experiences spring in March, the southern hemisphere experiences it in September.