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The time duration from 4am to 8am is exactly 4 hours, which equals 240 minutes or 14400 seconds.
4am to 8am spans 4 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 8am (08:00), but you can adjust the date or add seconds for more specific calculations.