How to Use the Time Calculator

Calculate Duration Between Two Dates/Times

• Enter the Start Date & Time (Day, Month, Year, Hour, Minute, Second).
• Enter the End Date & Time.
• Click "Calculate Duration". The result will show the time difference in various units.

Add or Subtract Duration

• Enter the initial Start Date & Time.
• Specify the duration to add or subtract (Years, Months, Days, etc.).
• Select whether to "Add" or "Subtract" the duration.
• Click "Calculate New Date/Time".

Countdown Timer

• Enter the Target Date & Time for your event.
• Click "Start Countdown". A live timer will show the remaining time.

World Clock

• This section automatically displays the current time in several major international cities. The times update every second.

Note: For date inputs, Month is 1 (January) to 12 (December). Hour is in 24-hour format (0-23). Ensure all inputs are valid numbers.