January;the first month of the lunar year;one month;Jan;Jan. ;
例句:
It was unseasonably mild for late January.
一月下旬天气就这么暖和有点反常。
Today is the tenth of January.
今天是一月十日.
His allowance as Commissioner of Finance was five dollars a month.
他作为财政人民委员的“补贴”是五元钱一月.