If all you want is "minute or two" accuracy, you don't need a hires timer. Just set the milliseconds portion of your string to '000'. You are still two orders of magnitude better accuracy than the spec calls for.
Re^3: Epoch time in milliseconds: Is there a better way?
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It's true, I don't actually need real accuracy for the script to work, but my feeling is that having an accurate timestamp can't hurt. Also, I may want/need to use the data at some point in the future so I might as well do it right the first time.
-Logan "What do I want? I'm an American. I want more."