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The time duration from 5am to 12pm (noon) is exactly 7 hours, which equals 420 minutes or 25200 seconds.
5am to 12pm (noon) spans 7 hours. This period is during the early morning hours when many people are beginning to wake up or start their day.
The calculator above automatically sets the times to 5am (05:00) and 12pm (12:00), but you can adjust the date or add seconds for more specific calculations.