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The time duration from 12am (midnight) to 1am is exactly 1 hour, which equals 60 minutes or 3600 seconds.
12am (midnight) to 1am spans one hour. These early morning hours are often a quiet time when most people are asleep.
The calculator above automatically sets the times to 12am (00:00) and 1am (01:00), but you can adjust the date or add seconds for more specific calculations.