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The time duration from 9pm to 8am is exactly 11 hours, which equals 660 minutes or 39600 seconds.
9pm to 8am spans 11 hours. This period is during the evening or night hours when many people are winding down their day or engaging in leisure activities.
The calculator above automatically sets the times to 9pm (21:00) and 8am (08:00), 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.
