mid september
/mɪd sɛpˈtɛmbər/
noun
- The middle part of September, roughly from September 10 to September 20.
- We usually take a short vacation in mid-September when the weather is still warm.
- The school year starts in early September, but the first big test is in mid-September.
- By mid-September, the leaves begin to change color in the northern forests.