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The time duration from 4am to 5pm is exactly 13 hours, which equals 780 minutes or 46800 seconds.
4am to 5pm spans 13 hours. This period is during the early morning hours when most people are asleep.
The calculator above automatically sets the times to 4am (04:00) and 5pm (17:00), but you can adjust the date or add seconds for more specific calculations.