On the iPhone

• 1). Tap the iCal app to open it.
  
  
• 2). Tap the "+" button in the upper-right corner.
  
  
• 3). Enter the title, location, date, time, and any other necessary information. Tap "Alarm" to set a reminder. Tap "Notes" to add more information.
  
  
• 4). Tap "Done" to set the task.
  
  

On the Computer

• 1). Plug your iPhone into your computer; open iTunes if it doesn't open automatically. Click your iPhone under "Devices" on the left side of the iTunes window.
  
  
• 2). Click the "Info" tab above the picture of the iPhone in the center panel of the iTunes browser. Scroll down to "Sync Calendars."
  
  
• 3). Check the box next to "Sync iCal Calendars." If you have iCal on your computer, your Mac will detect this program and list your iCal calendars. Check the boxes next to the calendars you want to sync.
  
  
• 4). Click "Apply" to sync.