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The time duration from 12pm (noon) to 3am is exactly 15 hours, which equals 900 minutes or 54000 seconds.
12pm (noon) to 3am spans 15 hours. This period starts at noon and covers part of the daytime when people are typically active and working.
The calculator above automatically sets the times to 12pm (12:00) and 3am (03:00), 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.
