Time Calculator

1. Start Time: Enter hours, minutes, and seconds.
2. Operation: Add or Subtract a duration.
3. Duration: How long the event lasts.
4. Result: The accurate end time.

The Time Calculator helps you do arithmetic with clock times. It solves problems like: "If I start at 8:45 AM and work for 7 hours and 20 minutes, when do I finish?"

It handles the tricky AM/PM rollovers automatically.