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The time duration from 11pm to 9am is exactly 10 hours, which equals 600 minutes or 36000 seconds.
11pm to 9am spans 10 hours. This period is during the late night hours when many people are asleep or getting ready for bed.
The calculator above automatically sets the times to 11pm (23:00) 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.
