Run refresh on a timer

I have a macro that calls on 2 other macros and adds time stamp. I am trying to set it so it runs 4 times a day, every weekday. So it runs at 8am, 11am, 2pm and 5pm.....Mon thru Fri.

How would I modify below code?

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You can try something like this:

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Alternatively, you can use Windows Task Scheduler and run this without needing to open the excel file. Few guides online, including this