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What IceFusion tried to say was that it might help to check that, so it syncs online. 🙂

Does it not reset when you check it?
 
Yes, having "Set Time & Date Automatically" checked may help in this case because it will sync your computers clock to an internet time server (you don't have to use Apple's, you can use others like time-a.nist.gov, time-b.nist.gov, etc)
 
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