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The time duration from 1pm to 12am (midnight) is exactly 11 hours, which equals 660 minutes or 39600 seconds.
1pm to 12am (midnight) spans 11 hours. This period is during the afternoon hours when people are typically active and working.
The calculator above automatically sets the times to 1pm (13:00) and 12am (00:00), 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.
