英语中表示月份的名词包括January, February, March, April等，它们均为专有名词，原则上不可数。如：
I’ll be twenty-four in May. 到5月份我就24岁了。
February is the second month of the year. 二月是一年的第二个月份。
We’ve had to put our wedding off until September. 我们得把婚礼延期到9月举行。
但是，当月份名词受描绘性定语修饰并且不需特指时，其前通常要用不定冠词。如：
We’re having a very wet April. 今年4月雨水可真多。
另外，有时可用复数形式，表示几个或多个。如：
The last two Augusts have been very dry. 最近两年的八月天气都很午燥。
We’ve had two very cold Januarys in a row. 我们连续度过了两个非常寒冷的一月。
The last two Mays have been cold and rainy. 过去这两年的五月份一直寒冷多雨。
We have had snowstorms the last few Aprils. 这几年的四月份我们这里都有暴风雪。
The weather has been very mild during the past two Septembers. 这两年九月份的气候都很宜人。
Sales are up (for) this November in comparison with the previous two Novembers. 今年11月的销售量比前两年同期有所提高。