Hey Guys,
 New to using this plugin, I am on Eastern Standard Time(EST) and had set this to restart everyday at 5:00am. 

{
  "Daily restarts": [
    "5:00"
  ],
  "Restart when new Oxide.Rust is out": true,
  "Initiate countdown at": 600,
  "Enable UI": true,
  "UI position (X,Y)": "0.92, 0.92",
  "UI scale": 1.0,
  "Enable console logs": true,
  "Commands": [
    "sr",
    "srestart",
    "smoothrestart",
    "smoothrestarter"
  ],​

All the time handling functions are operating with current system time (of the server machine). There is no option for time zone change, you will have to take into account the difference between your local time and your server's system time.