My computer date is changing weirdly

Yesterday my computer date was showing 27 November, I correct it and set it as 28 November. But today when I again checked the date it is now showing 30 November, it should be 29 November

Is this some kind of virus?

Please guide me what to do in such situation?

 

Have you tried the simple thing of changing it to the correct date and then check to see if it stays?

 

Please read my post again, I already mentioned that despite of setting the date it keep changing.

 

Could be a virus or sometimes when you add a device like the blackberry it throws off the configuration

So scan your PC for Virus and Malware.. just starting ruling things out

 

It looks like I have figured out why the time was changing.

I just disabled the synchronization of my PC timing. Let see if it still changes the date or not.