九月的英文缩写是Sep或者Sept。九月的英文表达形式为September，“在九月”可以说成“in September”。例句：Teachers' Day is in September.教师节在九月份。
十二个月的英文缩写
一月：January，缩写为Jan.
二月：February，缩写为Feb.
三月：March，缩写为Mar.
四月：April，缩写为Apr.
五月：May，缩写为May.
六月：June，缩写为Jun.
七月：July，缩写为Jul.
八月：August，缩写为Aug.
九月：September，缩写为Sept.
十月：October，缩写为Oct.
十一月：November，缩写为Nov.
十二月：December，缩写为Dec.
September的双语例句
1、September was a long way off.
那时离九月份还有很长一段时间。
2、The rains come in September.
雨季九月份开始。
3、September had come and the leaves were starting to fall.
已到九月了，树叶开始凋落。
4、Her birthday is on the fifth of September.
她的生日是九月五号。
5、September was passing and there was still no news of him.
九月就要过去了，仍没有他的消息。