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The time duration from 10am to 9am is exactly 23 hours, which equals 1380 minutes or 82800 seconds.
10am to 9am spans 23 hours. This period is during the morning hours when most people are active and starting their workday.
The calculator above automatically sets the times to 10am (10:00) and 9am (09:00), but you can adjust the date or add seconds for more specific calculations.
When the end time is earlier than the start time, the calculator automatically sets the end date to the next day.
