Military Time Converter

This converter moves a time between the 24 hour military clock and the ordinary 12 hour clock, and works out how long a span lasts even when it runs through midnight. Enter a military time such as 1430, or an hour, minute and AM or PM, and it returns the other form, how the time is spoken aloud, and the minutes past midnight. A third mode takes a start and an end and gives the elapsed hours and minutes. It answers the cases people reverse most often: 0000 is midnight starting the day, 2400 is midnight ending it, and 1200 is noon rather than midnight.