Which term denotes a 24-hour period starting at 0001 local time?

• A. Bank
• B. Bid
• C. Calendar Day
• D. Configuration

Answer: (C)

The main idea is how we define a day for scheduling and records. A calendar day is a 24-hour block anchored to the local clock and starts at the first minute of the day, 0001 local time, ending just before the next day begins. In practice, that means the day runs from 0001 to 2359 in local time, with a new calendar day beginning at 0001 again. This standardizes how we count days for logs, duty hours, and trip planning, so everyone uses the same time frame. The other terms aren’t about a 24-hour time span: a bank day refers to when banks are open, a bid is a proposal, and a configuration is a setup or arrangement. So the term that denotes a 24-hour period starting at 0001 local time is calendar day.