A script to close a particular order at a particular time

Hi all,

 I need a script/EA to close SOME positions  based on time, e.i. on Saturday morning 4.58am.

I can SELECT which position to close base on ticket number, NOT closing ALL position. I can select what time to close (NOT PRICE), say Friday 1.54pm.  It has to be 100% reliable and be able to prove that it works in real trading environment. I need to know that the EA/script is in place and be able to change it anytime. Any help? Thanks!