January

January was a month which contained New Year's Day, and was thus the first month of the year. (DWN: Doctor Who)

It was also a month that, on Earth at least, was characterised by great commercial activity in the form of after-Christmas sales. The Eighth Doctor once offered to take Samantha Jones back to Earth in time for these sales. (EDA: Genocide)

In 1918, January was the month that rationing of sugar began in Britain, as a result of World War I. Some people, like Constable Albert Briggs, therefore regarded January 1918 as the first time they really understood the deprivations of war. (EDA: Casualties of War)