* In many parts of the United States, the first semester (or fall semester) typically begins in late August or early September and runs for approximately 4 months, ending around mid-December.
* Other countries have different academic calendars. Some might start in January or February, while others may use different semester lengths.
To know when the first semester starts and how long it lasts, you need to specify the institution you're asking about. Check the institution's academic calendar on their official website.