{
  "segments": {
    "right": [
      {
        "function": "powerline.segments.common.sys.uptime",
        "priority": 50
      },
      {
        "function": "powerline.segments.common.sys.system_load",
        "priority": 50
      },
      {
        "function": "powerline.segments.common.time.date"
      },
      {
        "function": "powerline.segments.common.time.date",
        "name": "time",
        "args": {
          "format": "%H:%M",
          "istime": true
        }
      },
      {
        "function": "powerline.segments.common.net.hostname",
        "name": "hostname",
        "args": {
          "exclude_domain": true
        }
      }
    ]
  }
}

{
  "segments": {
    "right": [
      {
        "function": "powerline.segments.common.sys.uptime",
        "priority": 50
      },
      {
        "function": "powerline.segments.common.sys.system_load",
        "priority": 50
      },
      {
        "function": "powerline.segments.common.time.date",
        "name": "time",
        "args": {
          "format": "%Y-%m-%d %H:%M",
          "istime": true
        }
      },
      {
        "function": "powerline.segments.common.net.hostname",
        "name": "hostname",
        "args": {
          "exclude_domain": true
        }
      }
    ]
  }
}

Remove time+date widget from powerline and change time format
Remove time+date widget from powerline and change time format
