in December
October 21
Officially, winter begins with the Winter Solstice on December 21.
Winter begins on or about June 21 in the southern hemisphere.
December 21
In Green Bay Wisconsin, it starts November 22.
spring and autumn begin midway between the two solstices. these are the aquinoxes.
Yes the fourth month is April
Anywhere from October to about late MArch can be considered winter
In the US, fall officially ends in the month of December (specifically, December 21st), when winter begins.
The month of January in the USofA is in the middle of winter.
The US did not begin WW1. It had been under way a long time before the US finally decided to take part.
The third month of winter is typically February.