For those interested in nuances, it's worth noting that in British English, you might also hear "the first of September," which reverses the order but conveys the same meaning. Both forms are correct and widely understood, so choosing one over the other often depends on personal preference or context.

In formal settings, such as legal documents or academic papers, the numerical format (e.g., 9/1 or 1/9 depending on regional conventions) might be preferred, while conversational English leans more towards the spoken form. Understanding these variations can help in effectively communicating across different audiences and cultures.