一月一日英文缩写：Jan. 1st

January n.一月

复数： Januaries

1日： first （1st）

例句：

Both chambers plan to vote on that policy before January 15th

两院都打算在1月15日前对那一政策进行投票表决。

He arrived in San Francisco, having left New Jersey on January 19th

1月19日离开新泽西后，他到了旧金山。

They will have to pay much more when rents treble in January

一月份房租增加两倍时，他们将被迫多付不少钱。