What is the military time for 9:30 PM?

The military time for 9:30 PM is correctly represented as 2130. In military time, hours are counted from 00 (midnight) to 23 (11 PM) without using "AM" or "PM." To convert 9:30 PM to military time, you start by adding 12 to the hour portion of the time in standard form. Since PM times require this addition for any hour after 12, you calculate 9 + 12 which equals 21. The minutes remain the same, so you add :30, resulting in 2130.

This understanding of military time is crucial in military operations, where clarity and precision in communication around time are vital.