Keyboard strokes and their actions:
0 - 9
:
A/P
down/up
left/right
shift+/tab
home/end
ctrl+home
ctrl+end or delete
direct time entry
move to next time portion
set AM/PM
decrement/increment current time portion
move to previous/next time portion
move to previous/next time portion
move to the first/last time portion
set to the current time
clear the time