Delete Unix/Linux file at a specific time in future.

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http://www.unix.com – Hi, I was wondering if there is a command to delete a file in the future. For example: If I create a file named unix.lst using the vi editor, but after I create it, what command will be suitable to delete "unix" files from the system at 13:40 military time with no log file. I was going to use : find /root -name unix -exec rm {} \; but I believe that it wont really work the way I want it to. I would really appreciate your take on this. Thanks in advance (HowTos)