Yes I'm sure. The output when adding that line:

class ScheduledTaskSpec

{

  Name = Snapshot

  Description = Take a snapshot of servername

  Enabled = True

  Scheduler =

    class OnceTaskScheduler

    {

      RunAt =

        class DateTime

        {

          Date = 5/4/2019 12:00:00 AM

          Day = 4

          DayOfWeek = Saturday

          DayOfYear = 124

          Hour = 17

          Kind = Unspecified

          Millisecond = 0

          Minute = 30

          Month = 5

          Second = 0

          Ticks = 636925878000000000

          TimeOfDay = 17:30:00

          Year = 2019

          DateTime = Saturday, May 4, 2019 5:30:00 PM

        }

      ActiveTime =

      ExpireTime =

    }

  Action =

    class MethodAction

    {

      Name = CreateSnapshot_Task

      Argument =

        [

          VMware.Vim.MethodActionArgument

          VMware.Vim.MethodActionArgument

        ]

    }

  Notification = <someone@somewhere.com>

}