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The time duration from 4pm to 1pm is exactly 21 hours, which equals 1260 minutes or 75600 seconds.
4pm to 1pm spans 21 hours. This period is during the afternoon hours when people are typically active and working.
The calculator above automatically sets the times to 4pm (16:00) and 1pm (13:00), 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.
