Evaluate time and add files to RAR with correct Name using CMD batch

I need to add certain files to TodayDate.rar for this I am using cmd batch file with following code which is working fine.

"C:\Program Files\WinRAR\rar" a -agmmddyy ".rar"

Now I am changing above code and using If Condition as in following code then it is not working. why?

if %time:~0,2% lss 13(
"C:\Program Files\WinRAR\rar" a -agmmddyy " Morning.rar"
) else (
"C:\Program Files\WinRAR\rar" a -agmmddyy "Afternoon.rar"
)

Actually I need to do this Two time, first in the morning and second in afternoon that's why I added if condition to evaluate time and write the Name of file with Morning and Afternoon accordingly.