title: Java script date object
body: <p>Does the date object get the values from the operating system locally ? what if someone changes his time value , in my project I need to implement a system for reserving food, in my case the user can't make request for food before 10 am , but what if one of the users change his current time ? 
  I think that the best choice is to get time value form backed side.
  any suggestions ?   </p>