You want to convert the time from a 12 hour clock to a 24 hour clock. If you are given the time on a 12 hour clock, you should output the time as it would appear on a 24 hour clock.
Determine if the time you are given is AM or PM, then convert that value to the way that it would appear on a 24 hour clock.
A string that includes the time, then a space and the indicator for AM or PM.
A string that includes the time in a 24 hour format (XX:XX)
1:15 PM
13:15
1:00 PM on a 12 hour clock is equivalent to 13:00 on a 24 hour clock.