I also discovered this when I tried to Logon this morning. I purposely set my computer clock a couple of minutes ahead on purpose for another reason, and if it has to be set to an exact time, then I guess I won't be going to Sawmill Creek any more. I'm not changing my computer's clock time just to suit them. To me, any time and date setting within plus or minus 5 minutes and the correct date should be acceptable to them. We should not have to synchronize our computers that closely to exactly match the National Bureau of Standards time, which is available to you if you want it exact by looking at your cell phone time. It is provided automatically on the cell phones by the GPS satellite system.
If you want to change your computer clock, just click on where Windows displays your computer's time and/or date. You can then change either there, then clock on "Apply" and both the time and date will be corrected. For me, I'm leaving my clock off by a few minutes "on purpose".
Central North Carolina