Antarctica is a continent and does not expand during any season.
However, the ice sheet that covers 98% of the continent, during winter, merges with the frozen sea ice of the Southern Ocean, and thus, essentially doubles the size of the ice sheet.
You may be thinking of the frozen sea ice of the Southern Ocean, which surrounds the continent in winter.
Seasons in Antarctica are Spring, Summer, Fall and Winter.
winter
Antarctica receives zero hours of daylight in the winter.
Yes, but only in winter. Sea ice covers a zone between 100 and 800 miles wide around the perimeter of Antarctica beginning in March and continuing through September.
In the Southern Hemisphere, which includes Antarctica, winter begins on June 21.
The winter solstice in Antarctica occurred on June 21, 2009, also called 'mid-winter's day'.
Antarctica
always
Blizzards in Antarctica are fairly constant.
The name for the seawater ice, that essentially doubles the size of the continent, is called sea ice.
Foodstuffs are shipped to Antarctica during the summer months, for storage and use during the winter.